Support for running with M-Mode
This commit is contained in:
bigmagic
parent
0dc972bee6
commit
b7c7c7f4de
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@ -213,6 +213,7 @@ CONFIG_RT_LIBC_FIXED_TIMEZONE=8
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# CONFIG_RT_USING_RYM is not set
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# CONFIG_RT_USING_ULOG is not set
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# CONFIG_RT_USING_UTEST is not set
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# CONFIG_RT_USING_RT_LINK is not set
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#
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# RT-Thread Utestcases
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@ -335,6 +336,7 @@ CONFIG_RT_LIBC_FIXED_TIMEZONE=8
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# CONFIG_PKG_USING_HELIX is not set
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# CONFIG_PKG_USING_AZUREGUIX is not set
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# CONFIG_PKG_USING_TOUCHGFX2RTT is not set
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# CONFIG_PKG_USING_NUEMWIN is not set
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#
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# tools packages
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@ -492,6 +494,7 @@ CONFIG_RT_LIBC_FIXED_TIMEZONE=8
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# CONFIG_PKG_USING_LIBNFC is not set
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# CONFIG_PKG_USING_MFOC is not set
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# CONFIG_PKG_USING_TMC51XX is not set
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# CONFIG_PKG_USING_TCA9534 is not set
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#
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# AI packages
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@ -519,6 +522,7 @@ CONFIG_RT_LIBC_FIXED_TIMEZONE=8
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# CONFIG_PKG_USING_FLEXIBLE_BUTTON is not set
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# CONFIG_PKG_USING_CANFESTIVAL is not set
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# CONFIG_PKG_USING_ZLIB is not set
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# CONFIG_PKG_USING_MINIZIP is not set
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# CONFIG_PKG_USING_DSTR is not set
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# CONFIG_PKG_USING_TINYFRAME is not set
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# CONFIG_PKG_USING_KENDRYTE_DEMO is not set
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@ -558,7 +562,8 @@ CONFIG_BOARD_virt=y
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CONFIG_RT_USING_USERSPACE=y
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#
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# General Purpose UARTs
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# RISCV qemu virt64 configs
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#
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# CONFIG_BSP_USING_UART1 is not set
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# CONFIG_RISCV_S_MODE is not set
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CONFIG___STACKSIZE__=16384
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@ -31,7 +31,11 @@ stack_size = 4096
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stack_lds = open('link_stacksize.lds', 'w')
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if GetDepend('__STACKSIZE__'): stack_size = GetDepend('__STACKSIZE__')
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stack_lds.write('__STACKSIZE__ = %d;' % stack_size)
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stack_lds.write('__STACKSIZE__ = %d;\r\n' % stack_size)
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if GetDepend('RISCV_S_MODE'): start_addr = int(0x80200000)
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else: start_addr = int(0x80000000)
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stack_lds.write('__START_ADDR__ = 0x%x;' % start_addr)
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stack_lds.close()
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# make a building
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@ -1,10 +1,11 @@
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/*
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* Copyright (c) 2006-2018, RT-Thread Development Team
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-05-20 bigmagic first version
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*/
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#include <rtthread.h>
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@ -14,9 +15,7 @@
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int main(void)
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{
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void rt_hw_uart_start_rx_thread();
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rt_hw_uart_start_rx_thread();
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printf("Hello RISC-V\n");
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printf("Hello RISC-V!\n");
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return 0;
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}
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@ -1,6 +1,6 @@
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menu "General Purpose UARTs"
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menu "RISCV qemu virt64 configs"
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menuconfig BSP_USING_UART1
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bool "Enable UART1"
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@ -14,5 +14,8 @@ menuconfig BSP_USING_UART1
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default 21
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endif
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endmenu
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config RISCV_S_MODE
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bool "RT-Thread run in riscv smode"
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default y
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endmenu
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@ -21,6 +21,9 @@
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#include "sbi.h"
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#include "riscv.h"
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#include "stack.h"
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#include "riscv_io.h"
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#include "plic.h"
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#include "interrupt.h"
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void primary_cpu_entry(void)
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{
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@ -33,11 +36,6 @@ void primary_cpu_entry(void)
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entry();
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}
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void rt_hw_interrupt_init()
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{
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/* Enable machine external interrupts. */
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set_csr(sie, SIP_SEIP);
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}
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void rt_hw_board_init(void)
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{
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@ -46,10 +44,7 @@ void rt_hw_board_init(void)
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/* initialize hardware interrupt */
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rt_hw_uart_init();
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rt_hw_tick_init();
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#ifdef RT_USING_HEAP
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rt_kprintf("heap: [0x%08x - 0x%08x]\n", (rt_ubase_t) RT_HW_HEAP_BEGIN, (rt_ubase_t) RT_HW_HEAP_END);
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/* initialize memory system */
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rt_system_heap_init(RT_HW_HEAP_BEGIN, RT_HW_HEAP_END);
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#endif
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@ -58,6 +53,8 @@ void rt_hw_board_init(void)
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/* set console device */
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rt_console_set_device("uart");
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#endif /* RT_USING_CONSOLE */
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rt_hw_tick_init();
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rt_kprintf("heap: [0x%08x - 0x%08x]\n", (rt_ubase_t) RT_HW_HEAP_BEGIN, (rt_ubase_t) RT_HW_HEAP_END);
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#ifdef RT_USING_COMPONENTS_INIT
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rt_components_board_init();
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@ -71,137 +68,3 @@ void rt_hw_cpu_reset(void)
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}
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MSH_CMD_EXPORT_ALIAS(rt_hw_cpu_reset, reboot, reset machine);
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void dump_regs(struct rt_hw_stack_frame *regs)
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{
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rt_kprintf("--------------Dump Registers-----------------\n");
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rt_kprintf("Function Registers:\n");
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rt_kprintf("\tra(x1) = 0x%p\tuser_sp = 0x%p\n",regs -> ra,regs -> user_sp_exc_stack);
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rt_kprintf("\tgp(x3) = 0x%p\ttp(x4) = 0x%p\n",regs -> gp,regs -> tp);
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rt_kprintf("Temporary Registers:\n");
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rt_kprintf("\tt0(x5) = 0x%p\tt1(x6) = 0x%p\n",regs -> t0,regs -> t1);
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rt_kprintf("\tt2(x7) = 0x%p\n",regs -> t2);
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rt_kprintf("\tt3(x28) = 0x%p\tt4(x29) = 0x%p\n",regs -> t3,regs -> t4);
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rt_kprintf("\tt5(x30) = 0x%p\tt6(x31) = 0x%p\n",regs -> t5,regs -> t6);
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rt_kprintf("Saved Registers:\n");
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rt_kprintf("\ts0/fp(x8) = 0x%p\ts1(x9) = 0x%p\n",regs -> s0_fp,regs -> s1);
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rt_kprintf("\ts2(x18) = 0x%p\ts3(x19) = 0x%p\n",regs -> s2,regs -> s3);
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rt_kprintf("\ts4(x20) = 0x%p\ts5(x21) = 0x%p\n",regs -> s4,regs -> s5);
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rt_kprintf("\ts6(x22) = 0x%p\ts7(x23) = 0x%p\n",regs -> s6,regs -> s7);
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rt_kprintf("\ts8(x24) = 0x%p\ts9(x25) = 0x%p\n",regs -> s8,regs -> s9);
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rt_kprintf("\ts10(x26) = 0x%p\ts11(x27) = 0x%p\n",regs -> s10,regs -> s11);
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rt_kprintf("Function Arguments Registers:\n");
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rt_kprintf("\ta0(x10) = 0x%p\ta1(x11) = 0x%p\n",regs -> a0,regs -> a1);
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rt_kprintf("\ta2(x12) = 0x%p\ta3(x13) = 0x%p\n",regs -> a2,regs -> a3);
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rt_kprintf("\ta4(x14) = 0x%p\ta5(x15) = 0x%p\n",regs -> a4,regs -> a5);
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rt_kprintf("\ta6(x16) = 0x%p\ta7(x17) = 0x%p\n",regs -> a6,regs -> a7);
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rt_kprintf("sstatus = 0x%p\n",regs -> sstatus);
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rt_kprintf("\t%s\n",(regs -> sstatus & SSTATUS_SIE) ? "Supervisor Interrupt Enabled" : "Supervisor Interrupt Disabled");
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rt_kprintf("\t%s\n",(regs -> sstatus & SSTATUS_SPIE) ? "Last Time Supervisor Interrupt Enabled" : "Last Time Supervisor Interrupt Disabled");
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rt_kprintf("\t%s\n",(regs -> sstatus & SSTATUS_SPP) ? "Last Privilege is Supervisor Mode" : "Last Privilege is User Mode");
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rt_kprintf("\t%s\n",(regs -> sstatus & SSTATUS_PUM) ? "Permit to Access User Page" : "Not Permit to Access User Page");
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rt_kprintf("\t%s\n",(regs -> sstatus & (1 << 19)) ? "Permit to Read Executable-only Page" : "Not Permit to Read Executable-only Page");
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rt_size_t satp_v = read_csr(satp);
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rt_kprintf("satp = 0x%p\n",satp_v);
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const char *mode_str = "Unknown Address Translation/Protection Mode";
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switch(__MASKVALUE(satp_v >> 60,__MASK(4)))
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{
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case 0:
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mode_str = "No Address Translation/Protection Mode";
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break;
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case 8:
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mode_str = "Page-based 39-bit Virtual Addressing Mode";
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break;
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case 9:
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mode_str = "Page-based 48-bit Virtual Addressing Mode";
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break;
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}
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rt_kprintf("\tMode = %s\n",mode_str);
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rt_kprintf("-----------------Dump OK---------------------\n");
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}
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static const char *Exception_Name[] =
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{
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"Instruction Address Misaligned",
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"Instruction Access Fault",
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"Illegal Instruction",
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"Breakpoint",
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"Load Address Misaligned",
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"Load Access Fault",
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"Store/AMO Address Misaligned",
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"Store/AMO Access Fault",
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"Environment call from U-mode",
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"Environment call from S-mode",
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"Reserved-10",
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"Reserved-11",
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"Instruction Page Fault",
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"Load Page Fault",
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"Reserved-14",
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"Store/AMO Page Fault"
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};
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static const char *Interrupt_Name[] =
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{
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"User Software Interrupt",
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"Supervisor Software Interrupt",
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"Reversed-2",
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"Reversed-3",
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"User Timer Interrupt",
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"Supervisor Timer Interrupt",
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"Reversed-6",
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"Reversed-7",
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"User External Interrupt",
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"Supervisor External Interrupt",
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"Reserved-10",
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"Reserved-11",
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};
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void handle_trap(rt_size_t scause,rt_size_t stval,rt_size_t sepc,struct rt_hw_stack_frame *sp)
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{
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if(scause == (uint64_t)(0x8000000000000005))
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{
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rt_interrupt_enter();
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tick_isr();
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rt_interrupt_leave();
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}
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else
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{
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rt_size_t id = __MASKVALUE(scause,__MASK(63UL));
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const char *msg;
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if(scause >> 63)
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{
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if(id < sizeof(Interrupt_Name) / sizeof(const char *))
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{
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msg = Interrupt_Name[id];
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}
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else
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{
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msg = "Unknown Interrupt";
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}
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rt_kprintf("Unhandled Interrupt %ld:%s\n",id,msg);
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}
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else
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{
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if(id < sizeof(Exception_Name) / sizeof(const char *))
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{
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msg = Exception_Name[id];
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}
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else
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{
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msg = "Unknown Exception";
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}
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rt_kprintf("Unhandled Exception %ld:%s\n",id,msg);
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}
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rt_kprintf("scause:0x%p,stval:0x%p,sepc:0x%p\n",scause,stval,sepc);
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dump_regs(sp);
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while(1);
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}
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}
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@ -1,10 +1,12 @@
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/*
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* Copyright (c) 2019-2020, Xim
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-05-20 bigmagic first version
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*/
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#include <rthw.h>
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#include <rtdevice.h>
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@ -13,8 +15,7 @@
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#include <stdio.h>
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#include "sbi.h"
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#define UART_DEFAULT_BAUDRATE 115200
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#include "interrupt.h"
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struct device_uart
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{
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@ -27,24 +28,26 @@ static rt_err_t uart_control(struct rt_serial_device *serial, int cmd, void *arg
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static int drv_uart_putc(struct rt_serial_device *serial, char c);
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static int drv_uart_getc(struct rt_serial_device *serial);
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const struct rt_uart_ops _uart_ops =
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void virt_uart_init(void)
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{
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rt_uart_configure,
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uart_control,
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drv_uart_putc,
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drv_uart_getc,
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//TODO: add DMA support
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RT_NULL
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};
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//http://byterunner.com/16550.html
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uart_write_reg(IER, 0x00);
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void uart_init(void)
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{
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return ;
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uint8_t lcr = uart_read_reg(LCR);
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uart_write_reg(LCR, lcr | (1 << 7));
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uart_write_reg(DLL, 0x03);
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uart_write_reg(DLM, 0x00);
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lcr = 0;
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uart_write_reg(LCR, lcr | (3 << 0));
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/*
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* enable receive interrupts.
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*/
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uint8_t ier = uart_read_reg(IER);
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uart_write_reg(IER, ier | (1 << 0));
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}
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struct rt_serial_device serial1;
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struct device_uart uart1;
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/*
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* UART interface
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*/
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@ -58,22 +61,6 @@ static rt_err_t rt_uart_configure(struct rt_serial_device *serial, struct serial
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return (RT_EOK);
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}
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#define UART_LSR_DR 0x01 /* Data ready */
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#define UART_LSR_THRE 0x20 /* Xmit holding register empty */
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#define UART_RBR(hw) HWREG32(hw + 0x00)
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#define UART_IER(hw) HWREG32(hw + 0x04)
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#define UART_LSR(hw) HWREG32(hw + 0x14)
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static volatile uint64_t uart_hwbase = 0x10000000;
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void uart_putc(char c)
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{
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while ((UART_LSR(uart_hwbase) & UART_LSR_THRE) == 0);
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UART_RBR(uart_hwbase) = c;
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}
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static rt_err_t uart_control(struct rt_serial_device *serial, int cmd, void *arg)
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{
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struct device_uart *uart;
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@ -98,37 +85,37 @@ static rt_err_t uart_control(struct rt_serial_device *serial, int cmd, void *arg
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static int drv_uart_putc(struct rt_serial_device *serial, char c)
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{
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sbi_console_putchar(c);
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return (1);
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while ((uart_read_reg(LSR) & LSR_TX_IDLE) == 0);
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return uart_write_reg(THR, c);
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}
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static int drv_uart_getc(struct rt_serial_device *serial)
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{
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return sbi_console_getchar();
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if (uart_read_reg(LSR) & LSR_RX_READY){
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return uart_read_reg(RHR);
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} else {
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return -1;
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}
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//return sbi_console_getchar();
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}
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char rt_hw_console_getchar(void)
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{
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return sbi_console_getchar();
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}
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static void uart_rx(void *param)
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static void rt_hw_uart_isr(int irqno, void *param)
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{
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struct rt_serial_device *serial = (struct rt_serial_device*)param;
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while(1)
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{
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rt_hw_serial_isr((struct rt_serial_device *)serial,RT_SERIAL_EVENT_RX_IND);
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rt_thread_mdelay(10);
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}
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rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
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}
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void rt_hw_uart_start_rx_thread()
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struct rt_serial_device serial1;
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struct device_uart uart1;
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const struct rt_uart_ops _uart_ops =
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{
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rt_thread_t th;
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RT_ASSERT((th = rt_thread_create("uartrx",uart_rx,(void *)&serial1,8192,8,20)) != RT_NULL);
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RT_ASSERT(rt_thread_startup(th) == RT_EOK);
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}
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rt_uart_configure,
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uart_control,
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drv_uart_putc,
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drv_uart_getc,
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RT_NULL
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};
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/*
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* UART Initiation
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@ -138,7 +125,6 @@ int rt_hw_uart_init(void)
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struct rt_serial_device *serial;
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struct device_uart *uart;
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struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
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{
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serial = &serial1;
|
||||
uart = &uart1;
|
||||
|
|
@ -147,19 +133,19 @@ int rt_hw_uart_init(void)
|
|||
serial->config = config;
|
||||
serial->config.baud_rate = UART_DEFAULT_BAUDRATE;
|
||||
|
||||
uart->hw_base = 0x10000000;
|
||||
uart->irqno = 0xa;
|
||||
uart->hw_base = UART_BASE;
|
||||
uart->irqno = UART0_IRQ;
|
||||
|
||||
virt_uart_init();
|
||||
|
||||
rt_hw_serial_register(serial,
|
||||
"uart",
|
||||
RT_DEVICE_FLAG_STREAM | RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
|
||||
uart);
|
||||
rt_hw_interrupt_install(uart->irqno, rt_hw_uart_isr, serial, "uart");
|
||||
|
||||
rt_hw_interrupt_umask(uart->irqno);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* WEAK for SDK 0.5.6 */
|
||||
RT_WEAK void uart_debug_init(int uart_channel)
|
||||
{
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,15 +1,43 @@
|
|||
/*
|
||||
* Copyright (c) 2019-2020, Xim
|
||||
* Copyright (c) 2006-2021, RT-Thread Development Team
|
||||
*
|
||||
* SPDX-License-Identifier: Apache-2.0
|
||||
*
|
||||
* Change Logs:
|
||||
* Date Author Notes
|
||||
* 2021-05-20 bigmagic first version
|
||||
*/
|
||||
|
||||
#ifndef __DRV_UART_H__
|
||||
#define __DRV_UART_H__
|
||||
|
||||
void rt_hw_uart_start_rx_thread();
|
||||
#define UART0_IRQ (10)
|
||||
|
||||
#define UART_DEFAULT_BAUDRATE 115200
|
||||
|
||||
#define UART_BASE (0x10000000L)
|
||||
|
||||
#define RHR 0 // Receive Holding Register (read mode)
|
||||
#define THR 0 // Transmit Holding Register (write mode)
|
||||
#define DLL 0 // LSB of Divisor Latch (write mode)
|
||||
#define IER 1 // Interrupt Enable Register (write mode)
|
||||
#define DLM 1 // MSB of Divisor Latch (write mode)
|
||||
#define FCR 2 // FIFO Control Register (write mode)
|
||||
#define ISR 2 // Interrupt Status Register (read mode)
|
||||
#define LCR 3 // Line Control Register
|
||||
#define MCR 4 // Modem Control Register
|
||||
#define LSR 5 // Line Status Register
|
||||
#define MSR 6 // Modem Status Register
|
||||
#define SPR 7 // ScratchPad Register
|
||||
|
||||
#define UART_REG(reg) ((volatile uint8_t *)(UART_BASE + reg))
|
||||
|
||||
#define LSR_RX_READY (1 << 0)
|
||||
#define LSR_TX_IDLE (1 << 5)
|
||||
|
||||
#define uart_read_reg(reg) (*(UART_REG(reg)))
|
||||
#define uart_write_reg(reg, v) (*(UART_REG(reg)) = (v))
|
||||
|
||||
int rt_hw_uart_init(void);
|
||||
void drv_uart_puts(char *str); // for syscall
|
||||
|
||||
#endif /* __DRV_UART_H__ */
|
||||
|
|
|
|||
|
|
@ -0,0 +1,98 @@
|
|||
/*
|
||||
* Copyright (c) 2006-2021, RT-Thread Development Team
|
||||
*
|
||||
* SPDX-License-Identifier: Apache-2.0
|
||||
*
|
||||
* Change Logs:
|
||||
* Date Author Notes
|
||||
* 2021-05-20 bigmagic first version
|
||||
*/
|
||||
#include "rtthread.h"
|
||||
#include "plic.h"
|
||||
#include <riscv_io.h>
|
||||
#include "encoding.h"
|
||||
|
||||
/*
|
||||
* Each PLIC interrupt source can be assigned a priority by writing
|
||||
* to its 32-bit memory-mapped priority register.
|
||||
* The QEMU-virt (the same as FU540-C000) supports 7 levels of priority.
|
||||
* A priority value of 0 is reserved to mean "never interrupt" and
|
||||
* effectively disables the interrupt.
|
||||
* Priority 1 is the lowest active priority, and priority 7 is the highest.
|
||||
* Ties between global interrupts of the same priority are broken by
|
||||
* the Interrupt ID; interrupts with the lowest ID have the highest
|
||||
* effective priority.
|
||||
*/
|
||||
void plic_set_priority(int irq, int priority)
|
||||
{
|
||||
*(uint32_t*)PLIC_PRIORITY(irq) = priority;
|
||||
}
|
||||
|
||||
/*
|
||||
* Each global interrupt can be enabled by setting the corresponding
|
||||
* bit in the enables registers.
|
||||
*/
|
||||
void plic_irq_enable(int irq)
|
||||
{
|
||||
int hart = r_mhartid();
|
||||
*(uint32_t*)PLIC_ENABLE(hart) = ((*(uint32_t*)PLIC_ENABLE(hart)) | (1 << irq));
|
||||
#ifdef RISCV_S_MODE
|
||||
set_csr(sie, read_csr(sie) | MIP_SEIP);
|
||||
#else
|
||||
set_csr(mie, read_csr(mie) | MIP_MEIP);
|
||||
#endif
|
||||
}
|
||||
|
||||
void plic_irq_disable(int irq)
|
||||
{
|
||||
int hart = r_mhartid();
|
||||
*(uint32_t*)PLIC_ENABLE(hart) = (((*(uint32_t*)PLIC_ENABLE(hart)) & (~(1 << irq))));
|
||||
}
|
||||
|
||||
/*
|
||||
* PLIC will mask all interrupts of a priority less than or equal to threshold.
|
||||
* Maximum threshold is 7.
|
||||
* For example, a threshold value of zero permits all interrupts with
|
||||
* non-zero priority, whereas a value of 7 masks all interrupts.
|
||||
* Notice, the threshold is global for PLIC, not for each interrupt source.
|
||||
*/
|
||||
void plic_set_threshold(int threshold)
|
||||
{
|
||||
int hart = r_mhartid();
|
||||
*(uint32_t*)PLIC_THRESHOLD(hart) = threshold;
|
||||
}
|
||||
|
||||
/*
|
||||
* DESCRIPTION:
|
||||
* Query the PLIC what interrupt we should serve.
|
||||
* Perform an interrupt claim by reading the claim register, which
|
||||
* returns the ID of the highest-priority pending interrupt or zero if there
|
||||
* is no pending interrupt.
|
||||
* A successful claim also atomically clears the corresponding pending bit
|
||||
* on the interrupt source.
|
||||
* RETURN VALUE:
|
||||
* the ID of the highest-priority pending interrupt or zero if there
|
||||
* is no pending interrupt.
|
||||
*/
|
||||
int plic_claim(void)
|
||||
{
|
||||
int hart = r_mhartid();
|
||||
int irq = *(uint32_t*)PLIC_CLAIM(hart);
|
||||
return irq;
|
||||
}
|
||||
|
||||
/*
|
||||
* DESCRIPTION:
|
||||
* Writing the interrupt ID it received from the claim (irq) to the
|
||||
* complete register would signal the PLIC we've served this IRQ.
|
||||
* The PLIC does not check whether the completion ID is the same as the
|
||||
* last claim ID for that target. If the completion ID does not match an
|
||||
* interrupt source that is currently enabled for the target, the completion
|
||||
* is silently ignored.
|
||||
* RETURN VALUE: none
|
||||
*/
|
||||
void plic_complete(int irq)
|
||||
{
|
||||
int hart = r_mhartid();
|
||||
*(uint32_t*)PLIC_COMPLETE(hart) = irq;
|
||||
}
|
||||
|
|
@ -0,0 +1,61 @@
|
|||
/*
|
||||
* Copyright (c) 2006-2021, RT-Thread Development Team
|
||||
*
|
||||
* SPDX-License-Identifier: Apache-2.0
|
||||
*
|
||||
* Change Logs:
|
||||
* Date Author Notes
|
||||
* 2021-05-20 bigmagic first version
|
||||
*/
|
||||
|
||||
#ifndef PLIC_H
|
||||
#define PLIC_H
|
||||
|
||||
#include <rtconfig.h>
|
||||
/*
|
||||
* This machine puts platform-level interrupt controller (PLIC) here.
|
||||
* Here only list PLIC registers in Machine mode.
|
||||
*
|
||||
*/
|
||||
|
||||
#define VIRT_PLIC_BASE 0x0c000000L
|
||||
|
||||
#define PLIC_PRIORITY_OFFSET (0x0)
|
||||
#define PLIC_PENDING_OFFSET (0x1000)
|
||||
|
||||
#ifndef RISCV_S_MODE
|
||||
#define PLIC_MENABLE_OFFSET (0x2000)
|
||||
#define PLIC_MTHRESHOLD_OFFSET (0x200000)
|
||||
#define PLIC_MCLAIM_OFFSET (0x200004)
|
||||
#define PLIC_MCOMPLETE_OFFSET (0x200004)
|
||||
|
||||
#define PLIC_ENABLE(hart) (VIRT_PLIC_BASE + PLIC_MENABLE_OFFSET + (hart) * 0x80)
|
||||
#define PLIC_THRESHOLD(hart) (VIRT_PLIC_BASE + PLIC_MTHRESHOLD_OFFSET + (hart) * 0x1000)
|
||||
#define PLIC_CLAIM(hart) (VIRT_PLIC_BASE + PLIC_MCLAIM_OFFSET + (hart) * 0x1000)
|
||||
#define PLIC_COMPLETE(hart) (VIRT_PLIC_BASE + PLIC_MCOMPLETE_OFFSET + (hart) * 0x1000)
|
||||
|
||||
#else
|
||||
#define PLIC_SENABLE_OFFSET (0x2080)
|
||||
#define PLIC_STHRESHOLD_OFFSET (0x201000)
|
||||
#define PLIC_SCLAIM_OFFSET (0x201004)
|
||||
#define PLIC_SCOMPLETE_OFFSET (0x201004)
|
||||
|
||||
#define PLIC_ENABLE(hart) (VIRT_PLIC_BASE + PLIC_SENABLE_OFFSET + (hart) * 0x80)
|
||||
#define PLIC_THRESHOLD(hart) (VIRT_PLIC_BASE + PLIC_STHRESHOLD_OFFSET + (hart) * 0x1000)
|
||||
#define PLIC_CLAIM(hart) (VIRT_PLIC_BASE + PLIC_SCLAIM_OFFSET + (hart) * 0x1000)
|
||||
#define PLIC_COMPLETE(hart) (VIRT_PLIC_BASE + PLIC_SCOMPLETE_OFFSET + (hart) * 0x1000)
|
||||
#endif
|
||||
|
||||
#define PLIC_PRIORITY(id) (VIRT_PLIC_BASE + PLIC_PRIORITY_OFFSET + (id) * 4)
|
||||
#define PLIC_PENDING(id) (VIRT_PLIC_BASE + PLIC_PENDING_OFFSET + ((id) / 32))
|
||||
|
||||
|
||||
|
||||
void plic_set_priority(int irq, int priority);
|
||||
void plic_irq_enable(int irq);
|
||||
void plic_irq_disable(int irq);
|
||||
void plic_set_threshold(int mthreshold);
|
||||
int plic_claim(void);
|
||||
void plic_complete(int irq);
|
||||
|
||||
#endif
|
||||
|
|
@ -21,13 +21,13 @@ OUTPUT_ARCH( "riscv" )
|
|||
|
||||
MEMORY
|
||||
{
|
||||
SRAM : ORIGIN = 0x80200000, LENGTH = 0x7FF000
|
||||
SRAM : ORIGIN = __START_ADDR__, LENGTH = 0x7FF000
|
||||
}
|
||||
|
||||
ENTRY(_start)
|
||||
SECTIONS
|
||||
{
|
||||
. = 0x80200000 ;
|
||||
. = __START_ADDR__ ;
|
||||
|
||||
/* __STACKSIZE__ = 4096; */
|
||||
|
||||
|
|
|
|||
|
|
@ -1 +1,2 @@
|
|||
__STACKSIZE__ = 16384;
|
||||
__START_ADDR__ = 0x80000000;
|
||||
|
|
@ -0,0 +1 @@
|
|||
qemu-system-riscv64 -nographic -machine virt -m 256M -kernel rtthread.bin
|
||||
|
|
@ -1 +1 @@
|
|||
qemu-system-riscv64 -nographic -machine virt -m 256M -kernel rtthread.bin
|
||||
qemu-system-riscv64 -nographic -machine virt -m 256M -bios rtthread.bin
|
||||
|
|
|
|||
|
|
@ -177,7 +177,7 @@
|
|||
#define BOARD_virt
|
||||
#define RT_USING_USERSPACE
|
||||
|
||||
/* General Purpose UARTs */
|
||||
/* RISCV qemu virt64 configs */
|
||||
|
||||
#define __STACKSIZE__ 16384
|
||||
|
||||
|
|
|
|||
|
|
@ -9,44 +9,300 @@
|
|||
* 2018/12/27 Jesven Add SMP support
|
||||
* 2021/02/02 lizhirui Add userspace support
|
||||
*/
|
||||
|
||||
#include "cpuport.h"
|
||||
#include "stackframe.h"
|
||||
|
||||
#ifdef RT_USING_SMP
|
||||
#define rt_hw_interrupt_disable rt_hw_local_irq_disable
|
||||
#define rt_hw_interrupt_enable rt_hw_local_irq_enable
|
||||
#endif
|
||||
|
||||
/*
|
||||
* rt_base_t rt_hw_interrupt_disable(void);
|
||||
*/
|
||||
.globl rt_hw_interrupt_disable
|
||||
rt_hw_interrupt_disable:
|
||||
#ifdef RISCV_S_MODE
|
||||
csrrci a0, sstatus, 2
|
||||
#else
|
||||
csrrci a0, mstatus, 8
|
||||
#endif
|
||||
ret
|
||||
|
||||
|
||||
/*
|
||||
* void rt_hw_interrupt_enable(rt_base_t level);
|
||||
*/
|
||||
.globl rt_hw_interrupt_enable
|
||||
rt_hw_interrupt_enable:
|
||||
csrw SRC_XSTATUS, a0
|
||||
ret
|
||||
|
||||
/*
|
||||
* #ifdef RT_USING_SMP
|
||||
* void rt_hw_context_switch_to(rt_ubase_t to, stuct rt_thread *to_thread);
|
||||
* #else
|
||||
* void rt_hw_context_switch_to(rt_ubase_t to);
|
||||
* #endif
|
||||
* a0 --> to
|
||||
* a1 --> to_thread
|
||||
*/
|
||||
.globl rt_hw_context_switch_to
|
||||
rt_hw_context_switch_to:
|
||||
LOAD sp, (a0)
|
||||
|
||||
la s0, rt_current_thread
|
||||
LOAD s1, (s0)
|
||||
|
||||
RESTORE_ALL
|
||||
sret
|
||||
#ifdef RT_USING_SMP
|
||||
mv a0, a1
|
||||
call rt_cpus_lock_status_restore
|
||||
#endif
|
||||
LOAD a0, 2 * REGBYTES(sp)
|
||||
csrw SRC_XSTATUS, a0
|
||||
j rt_hw_context_switch_exit
|
||||
|
||||
/*
|
||||
* #ifdef RT_USING_SMP
|
||||
* void rt_hw_context_switch(rt_ubase_t from, rt_ubase_t to, struct rt_thread *to_thread);
|
||||
* #else
|
||||
* void rt_hw_context_switch(rt_ubase_t from, rt_ubase_t to);
|
||||
* #endif
|
||||
*
|
||||
* a0 --> from
|
||||
* a1 --> to
|
||||
* a2 --> to_thread
|
||||
*/
|
||||
.globl rt_hw_context_switch
|
||||
rt_hw_context_switch:
|
||||
mv t2, sp
|
||||
li t0, 0x120//set SPIE and SPP = 1
|
||||
csrs sstatus, t0//if enter here,caller must be in system thread
|
||||
csrw sepc, ra//return address
|
||||
//saved from thread context
|
||||
SAVE_ALL
|
||||
/* saved from thread context
|
||||
* x1/ra -> sp(0)
|
||||
* x1/ra -> sp(1)
|
||||
* mstatus.mie -> sp(2)
|
||||
* x(i) -> sp(i-4)
|
||||
*/
|
||||
#ifdef ARCH_RISCV_FPU
|
||||
addi sp, sp, -32 * FREGBYTES
|
||||
|
||||
STORE t2, 32 * REGBYTES(sp)//save user_sp
|
||||
FSTORE f0, 0 * FREGBYTES(sp)
|
||||
FSTORE f1, 1 * FREGBYTES(sp)
|
||||
FSTORE f2, 2 * FREGBYTES(sp)
|
||||
FSTORE f3, 3 * FREGBYTES(sp)
|
||||
FSTORE f4, 4 * FREGBYTES(sp)
|
||||
FSTORE f5, 5 * FREGBYTES(sp)
|
||||
FSTORE f6, 6 * FREGBYTES(sp)
|
||||
FSTORE f7, 7 * FREGBYTES(sp)
|
||||
FSTORE f8, 8 * FREGBYTES(sp)
|
||||
FSTORE f9, 9 * FREGBYTES(sp)
|
||||
FSTORE f10, 10 * FREGBYTES(sp)
|
||||
FSTORE f11, 11 * FREGBYTES(sp)
|
||||
FSTORE f12, 12 * FREGBYTES(sp)
|
||||
FSTORE f13, 13 * FREGBYTES(sp)
|
||||
FSTORE f14, 14 * FREGBYTES(sp)
|
||||
FSTORE f15, 15 * FREGBYTES(sp)
|
||||
FSTORE f16, 16 * FREGBYTES(sp)
|
||||
FSTORE f17, 17 * FREGBYTES(sp)
|
||||
FSTORE f18, 18 * FREGBYTES(sp)
|
||||
FSTORE f19, 19 * FREGBYTES(sp)
|
||||
FSTORE f20, 20 * FREGBYTES(sp)
|
||||
FSTORE f21, 21 * FREGBYTES(sp)
|
||||
FSTORE f22, 22 * FREGBYTES(sp)
|
||||
FSTORE f23, 23 * FREGBYTES(sp)
|
||||
FSTORE f24, 24 * FREGBYTES(sp)
|
||||
FSTORE f25, 25 * FREGBYTES(sp)
|
||||
FSTORE f26, 26 * FREGBYTES(sp)
|
||||
FSTORE f27, 27 * FREGBYTES(sp)
|
||||
FSTORE f28, 28 * FREGBYTES(sp)
|
||||
FSTORE f29, 29 * FREGBYTES(sp)
|
||||
FSTORE f30, 30 * FREGBYTES(sp)
|
||||
FSTORE f31, 31 * FREGBYTES(sp)
|
||||
|
||||
#endif
|
||||
addi sp, sp, -32 * REGBYTES
|
||||
STORE sp, (a0)
|
||||
|
||||
//restore to thread context
|
||||
STORE x1, 0 * REGBYTES(sp)
|
||||
STORE x1, 1 * REGBYTES(sp)
|
||||
|
||||
|
||||
csrr a0, SRC_XSTATUS
|
||||
#ifdef RISCV_S_MODE
|
||||
andi a0, a0, 2
|
||||
beqz a0, save_spie
|
||||
li a0, 0x20
|
||||
save_spie:
|
||||
STORE a0, 2 * REGBYTES(sp)
|
||||
#else
|
||||
andi a0, a0, 8
|
||||
beqz a0, save_mpie
|
||||
li a0, 0x80
|
||||
save_mpie:
|
||||
STORE a0, 2 * REGBYTES(sp)
|
||||
#endif
|
||||
|
||||
STORE x4, 4 * REGBYTES(sp)
|
||||
STORE x5, 5 * REGBYTES(sp)
|
||||
STORE x6, 6 * REGBYTES(sp)
|
||||
STORE x7, 7 * REGBYTES(sp)
|
||||
STORE x8, 8 * REGBYTES(sp)
|
||||
STORE x9, 9 * REGBYTES(sp)
|
||||
STORE x10, 10 * REGBYTES(sp)
|
||||
STORE x11, 11 * REGBYTES(sp)
|
||||
STORE x12, 12 * REGBYTES(sp)
|
||||
STORE x13, 13 * REGBYTES(sp)
|
||||
STORE x14, 14 * REGBYTES(sp)
|
||||
STORE x15, 15 * REGBYTES(sp)
|
||||
STORE x16, 16 * REGBYTES(sp)
|
||||
STORE x17, 17 * REGBYTES(sp)
|
||||
STORE x18, 18 * REGBYTES(sp)
|
||||
STORE x19, 19 * REGBYTES(sp)
|
||||
STORE x20, 20 * REGBYTES(sp)
|
||||
STORE x21, 21 * REGBYTES(sp)
|
||||
STORE x22, 22 * REGBYTES(sp)
|
||||
STORE x23, 23 * REGBYTES(sp)
|
||||
STORE x24, 24 * REGBYTES(sp)
|
||||
STORE x25, 25 * REGBYTES(sp)
|
||||
STORE x26, 26 * REGBYTES(sp)
|
||||
STORE x27, 27 * REGBYTES(sp)
|
||||
STORE x28, 28 * REGBYTES(sp)
|
||||
STORE x29, 29 * REGBYTES(sp)
|
||||
STORE x30, 30 * REGBYTES(sp)
|
||||
STORE x31, 31 * REGBYTES(sp)
|
||||
|
||||
/* restore to thread context
|
||||
* sp(0) -> epc;
|
||||
* sp(1) -> ra;
|
||||
* sp(i) -> x(i+2)
|
||||
*/
|
||||
LOAD sp, (a1)
|
||||
|
||||
la s0, rt_current_thread
|
||||
LOAD s1, (s0)
|
||||
#ifdef RT_USING_SMP
|
||||
mv a0, a2
|
||||
call rt_cpus_lock_status_restore
|
||||
#endif /*RT_USING_SMP*/
|
||||
|
||||
RESTORE_ALL
|
||||
sret
|
||||
j rt_hw_context_switch_exit
|
||||
|
||||
#ifdef RT_USING_SMP
|
||||
/*
|
||||
* void rt_hw_context_switch_interrupt(void *context, rt_ubase_t from, rt_ubase_t to, struct rt_thread *to_thread);
|
||||
*
|
||||
* a0 --> context
|
||||
* a1 --> from
|
||||
* a2 --> to
|
||||
* a3 --> to_thread
|
||||
*/
|
||||
.globl rt_hw_context_switch_interrupt
|
||||
rt_hw_context_switch_interrupt:
|
||||
|
||||
STORE a0, 0(a1)
|
||||
|
||||
LOAD sp, 0(a2)
|
||||
move a0, a3
|
||||
call rt_cpus_lock_status_restore
|
||||
|
||||
j rt_hw_context_switch_exit
|
||||
|
||||
#endif
|
||||
|
||||
.global rt_hw_context_switch_exit
|
||||
rt_hw_context_switch_exit:
|
||||
#ifdef RT_USING_SMP
|
||||
#ifdef RT_USING_SIGNALS
|
||||
mv a0, sp
|
||||
|
||||
csrr t0, mhartid
|
||||
/* switch interrupt stack of current cpu */
|
||||
la sp, __stack_start__
|
||||
addi t1, t0, 1
|
||||
li t2, __STACKSIZE__
|
||||
mul t1, t1, t2
|
||||
add sp, sp, t1 /* sp = (cpuid + 1) * __STACKSIZE__ + __stack_start__ */
|
||||
|
||||
call rt_signal_check
|
||||
mv sp, a0
|
||||
#endif
|
||||
#endif
|
||||
/* resw ra to mepc */
|
||||
LOAD a0, 0 * REGBYTES(sp)
|
||||
csrw SRC_XEPC, a0
|
||||
|
||||
LOAD x1, 1 * REGBYTES(sp)
|
||||
|
||||
#ifdef RISCV_S_MODE
|
||||
li t0, 0x00000120
|
||||
csrw sstatus, t0
|
||||
LOAD a0, 2 * REGBYTES(sp)
|
||||
csrs sstatus, a0
|
||||
#else
|
||||
li t0, 0x00007800
|
||||
csrw mstatus, t0
|
||||
LOAD a0, 2 * REGBYTES(sp)
|
||||
csrs mstatus, a0
|
||||
#endif
|
||||
|
||||
LOAD x4, 4 * REGBYTES(sp)
|
||||
LOAD x5, 5 * REGBYTES(sp)
|
||||
LOAD x6, 6 * REGBYTES(sp)
|
||||
LOAD x7, 7 * REGBYTES(sp)
|
||||
LOAD x8, 8 * REGBYTES(sp)
|
||||
LOAD x9, 9 * REGBYTES(sp)
|
||||
LOAD x10, 10 * REGBYTES(sp)
|
||||
LOAD x11, 11 * REGBYTES(sp)
|
||||
LOAD x12, 12 * REGBYTES(sp)
|
||||
LOAD x13, 13 * REGBYTES(sp)
|
||||
LOAD x14, 14 * REGBYTES(sp)
|
||||
LOAD x15, 15 * REGBYTES(sp)
|
||||
LOAD x16, 16 * REGBYTES(sp)
|
||||
LOAD x17, 17 * REGBYTES(sp)
|
||||
LOAD x18, 18 * REGBYTES(sp)
|
||||
LOAD x19, 19 * REGBYTES(sp)
|
||||
LOAD x20, 20 * REGBYTES(sp)
|
||||
LOAD x21, 21 * REGBYTES(sp)
|
||||
LOAD x22, 22 * REGBYTES(sp)
|
||||
LOAD x23, 23 * REGBYTES(sp)
|
||||
LOAD x24, 24 * REGBYTES(sp)
|
||||
LOAD x25, 25 * REGBYTES(sp)
|
||||
LOAD x26, 26 * REGBYTES(sp)
|
||||
LOAD x27, 27 * REGBYTES(sp)
|
||||
LOAD x28, 28 * REGBYTES(sp)
|
||||
LOAD x29, 29 * REGBYTES(sp)
|
||||
LOAD x30, 30 * REGBYTES(sp)
|
||||
LOAD x31, 31 * REGBYTES(sp)
|
||||
|
||||
addi sp, sp, 32 * REGBYTES
|
||||
|
||||
#ifdef ARCH_RISCV_FPU
|
||||
FLOAD f0, 0 * FREGBYTES(sp)
|
||||
FLOAD f1, 1 * FREGBYTES(sp)
|
||||
FLOAD f2, 2 * FREGBYTES(sp)
|
||||
FLOAD f3, 3 * FREGBYTES(sp)
|
||||
FLOAD f4, 4 * FREGBYTES(sp)
|
||||
FLOAD f5, 5 * FREGBYTES(sp)
|
||||
FLOAD f6, 6 * FREGBYTES(sp)
|
||||
FLOAD f7, 7 * FREGBYTES(sp)
|
||||
FLOAD f8, 8 * FREGBYTES(sp)
|
||||
FLOAD f9, 9 * FREGBYTES(sp)
|
||||
FLOAD f10, 10 * FREGBYTES(sp)
|
||||
FLOAD f11, 11 * FREGBYTES(sp)
|
||||
FLOAD f12, 12 * FREGBYTES(sp)
|
||||
FLOAD f13, 13 * FREGBYTES(sp)
|
||||
FLOAD f14, 14 * FREGBYTES(sp)
|
||||
FLOAD f15, 15 * FREGBYTES(sp)
|
||||
FLOAD f16, 16 * FREGBYTES(sp)
|
||||
FLOAD f17, 17 * FREGBYTES(sp)
|
||||
FLOAD f18, 18 * FREGBYTES(sp)
|
||||
FLOAD f19, 19 * FREGBYTES(sp)
|
||||
FLOAD f20, 20 * FREGBYTES(sp)
|
||||
FLOAD f21, 21 * FREGBYTES(sp)
|
||||
FLOAD f22, 22 * FREGBYTES(sp)
|
||||
FLOAD f23, 23 * FREGBYTES(sp)
|
||||
FLOAD f24, 24 * FREGBYTES(sp)
|
||||
FLOAD f25, 25 * FREGBYTES(sp)
|
||||
FLOAD f26, 26 * FREGBYTES(sp)
|
||||
FLOAD f27, 27 * FREGBYTES(sp)
|
||||
FLOAD f28, 28 * FREGBYTES(sp)
|
||||
FLOAD f29, 29 * FREGBYTES(sp)
|
||||
FLOAD f30, 30 * FREGBYTES(sp)
|
||||
FLOAD f31, 31 * FREGBYTES(sp)
|
||||
|
||||
addi sp, sp, 32 * FREGBYTES
|
||||
#endif
|
||||
|
||||
XRET
|
||||
|
|
|
|||
|
|
@ -70,8 +70,11 @@ rt_uint8_t *rt_hw_stack_init(void *tentry,
|
|||
frame->epc = (rt_ubase_t)tentry;
|
||||
frame->user_sp_exc_stack = (rt_ubase_t)(((rt_ubase_t)stk) + sizeof(struct rt_hw_stack_frame));
|
||||
|
||||
/* force to supervisor mode(SPP=1) and set SPIE and SUM to 1 */
|
||||
frame->sstatus = 0x00040120;
|
||||
#ifndef RISCV_S_MODE
|
||||
frame->xstatus = 0x00007880;
|
||||
#else
|
||||
frame->xstatus = 0x00040120;
|
||||
#endif
|
||||
|
||||
return stk;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -22,7 +22,34 @@
|
|||
// error here, not portable
|
||||
#endif
|
||||
|
||||
#endif
|
||||
#ifdef RISCV_U_MODE
|
||||
#define RISCV_USER_ENTRY 0xFFFFFFE000000000ULL
|
||||
#endif
|
||||
|
||||
#ifdef RISCV_S_MODE
|
||||
//csr in s-mode
|
||||
// M/U/S Interrupt Registers
|
||||
#define SRC_XIE sie
|
||||
#define SRC_XIP sip
|
||||
#define SRC_XTVEC stvec
|
||||
#define SRC_XSTATUS sstatus
|
||||
#define SRC_XSCRATCH sscratch
|
||||
#define SRC_XEPC sepc
|
||||
#define SRC_XCAUSE scause
|
||||
#define SRC_XTVAL stval
|
||||
#define XRET sret
|
||||
#else
|
||||
//csr in m-mode
|
||||
// M/U/S Interrupt Registers
|
||||
#define SRC_XIE mie
|
||||
#define SRC_XIP mip
|
||||
#define SRC_XTVEC mtvec
|
||||
#define SRC_XSTATUS mstatus
|
||||
#define SRC_XSCRATCH mscratch
|
||||
#define SRC_XEPC mepc
|
||||
#define SRC_XCAUSE mcause
|
||||
#define SRC_XTVAL mtval
|
||||
#define XRET mret
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -0,0 +1,274 @@
|
|||
/*
|
||||
* Copyright (c) 2006-2021, RT-Thread Development Team
|
||||
*
|
||||
* SPDX-License-Identifier: Apache-2.0
|
||||
*
|
||||
* Change Logs:
|
||||
* Date Author Notes
|
||||
* 2018/10/01 Bernard The first version
|
||||
* 2018/12/27 Jesven Change irq enable/disable to cpu0
|
||||
*/
|
||||
#include "tick.h"
|
||||
#include <plic.h>
|
||||
#include "encoding.h"
|
||||
#include "riscv.h"
|
||||
#include "interrupt.h"
|
||||
|
||||
#define CPU_NUM 2
|
||||
#define MAX_HANDLERS 128
|
||||
|
||||
static struct rt_irq_desc irq_desc[MAX_HANDLERS];
|
||||
|
||||
static rt_isr_handler_t rt_hw_interrupt_handle(rt_uint32_t vector, void *param)
|
||||
{
|
||||
rt_kprintf("UN-handled interrupt %d occurred!!!\n", vector);
|
||||
return RT_NULL;
|
||||
}
|
||||
|
||||
int rt_hw_clint_ipi_enable(void)
|
||||
{
|
||||
/* Set the Machine-Software bit in MIE */
|
||||
set_csr(mie, MIP_MSIP);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int rt_hw_clint_ipi_disable(void)
|
||||
{
|
||||
/* Clear the Machine-Software bit in MIE */
|
||||
clear_csr(mie, MIP_MSIP);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int rt_hw_plic_irq_enable(int irq_number)
|
||||
{
|
||||
plic_irq_enable(irq_number);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int rt_hw_plic_irq_disable(int irq_number)
|
||||
{
|
||||
plic_irq_disable(irq_number);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* This function will initialize hardware interrupt
|
||||
*/
|
||||
void rt_hw_interrupt_init(void)
|
||||
{
|
||||
int idx = 0;
|
||||
/* init exceptions table */
|
||||
for (idx = 0; idx < MAX_HANDLERS; idx++)
|
||||
{
|
||||
//rt_hw_interrupt_mask(idx);
|
||||
irq_desc[idx].handler = (rt_isr_handler_t)rt_hw_interrupt_handle;
|
||||
irq_desc[idx].param = RT_NULL;
|
||||
#ifdef RT_USING_INTERRUPT_INFO
|
||||
rt_snprintf(irq_desc[idx].name, RT_NAME_MAX - 1, "default");
|
||||
irq_desc[idx].counter = 0;
|
||||
#endif
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* This function will mask a interrupt.
|
||||
* @param vector the interrupt number
|
||||
*/
|
||||
void rt_hw_interrupt_mask(int vector)
|
||||
{
|
||||
rt_hw_plic_irq_disable(vector);
|
||||
}
|
||||
|
||||
/**
|
||||
* This function will un-mask a interrupt.
|
||||
* @param vector the interrupt number
|
||||
*/
|
||||
void rt_hw_interrupt_umask(int vector)
|
||||
{
|
||||
plic_set_priority(vector, 1);
|
||||
plic_set_threshold(0);
|
||||
rt_hw_plic_irq_enable(vector);
|
||||
}
|
||||
|
||||
/**
|
||||
* This function will install a interrupt service routine to a interrupt.
|
||||
* @param vector the interrupt number
|
||||
* @param new_handler the interrupt service routine to be installed
|
||||
* @param old_handler the old interrupt service routine
|
||||
*/
|
||||
rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
|
||||
void *param, const char *name)
|
||||
{
|
||||
rt_isr_handler_t old_handler = RT_NULL;
|
||||
|
||||
if(vector < MAX_HANDLERS)
|
||||
{
|
||||
old_handler = irq_desc[vector].handler;
|
||||
if (handler != RT_NULL)
|
||||
{
|
||||
irq_desc[vector].handler = (rt_isr_handler_t)handler;
|
||||
irq_desc[vector].param = param;
|
||||
#ifdef RT_USING_INTERRUPT_INFO
|
||||
rt_snprintf(irq_desc[vector].name, RT_NAME_MAX - 1, "%s", name);
|
||||
irq_desc[vector].counter = 0;
|
||||
#endif
|
||||
}
|
||||
}
|
||||
|
||||
return old_handler;
|
||||
}
|
||||
|
||||
RT_WEAK
|
||||
void plic_irq_handle(int irq)
|
||||
{
|
||||
rt_kprintf("UN-handled interrupt %d occurred!!!\n", irq);
|
||||
return ;
|
||||
}
|
||||
|
||||
void dump_regs(struct rt_hw_stack_frame *regs)
|
||||
{
|
||||
rt_kprintf("--------------Dump Registers-----------------\n");
|
||||
|
||||
rt_kprintf("Function Registers:\n");
|
||||
rt_kprintf("\tra(x1) = 0x%p\tuser_sp = 0x%p\n",regs -> ra,regs -> user_sp_exc_stack);
|
||||
rt_kprintf("\tgp(x3) = 0x%p\ttp(x4) = 0x%p\n",regs -> gp,regs -> tp);
|
||||
rt_kprintf("Temporary Registers:\n");
|
||||
rt_kprintf("\tt0(x5) = 0x%p\tt1(x6) = 0x%p\n",regs -> t0,regs -> t1);
|
||||
rt_kprintf("\tt2(x7) = 0x%p\n",regs -> t2);
|
||||
rt_kprintf("\tt3(x28) = 0x%p\tt4(x29) = 0x%p\n",regs -> t3,regs -> t4);
|
||||
rt_kprintf("\tt5(x30) = 0x%p\tt6(x31) = 0x%p\n",regs -> t5,regs -> t6);
|
||||
rt_kprintf("Saved Registers:\n");
|
||||
rt_kprintf("\ts0/fp(x8) = 0x%p\ts1(x9) = 0x%p\n",regs -> s0_fp,regs -> s1);
|
||||
rt_kprintf("\ts2(x18) = 0x%p\ts3(x19) = 0x%p\n",regs -> s2,regs -> s3);
|
||||
rt_kprintf("\ts4(x20) = 0x%p\ts5(x21) = 0x%p\n",regs -> s4,regs -> s5);
|
||||
rt_kprintf("\ts6(x22) = 0x%p\ts7(x23) = 0x%p\n",regs -> s6,regs -> s7);
|
||||
rt_kprintf("\ts8(x24) = 0x%p\ts9(x25) = 0x%p\n",regs -> s8,regs -> s9);
|
||||
rt_kprintf("\ts10(x26) = 0x%p\ts11(x27) = 0x%p\n",regs -> s10,regs -> s11);
|
||||
rt_kprintf("Function Arguments Registers:\n");
|
||||
rt_kprintf("\ta0(x10) = 0x%p\ta1(x11) = 0x%p\n",regs -> a0,regs -> a1);
|
||||
rt_kprintf("\ta2(x12) = 0x%p\ta3(x13) = 0x%p\n",regs -> a2,regs -> a3);
|
||||
rt_kprintf("\ta4(x14) = 0x%p\ta5(x15) = 0x%p\n",regs -> a4,regs -> a5);
|
||||
rt_kprintf("\ta6(x16) = 0x%p\ta7(x17) = 0x%p\n",regs -> a6,regs -> a7);
|
||||
rt_kprintf("xstatus = 0x%p\n",regs -> xstatus);
|
||||
rt_kprintf("\t%s\n",(regs -> xstatus & SSTATUS_SIE) ? "Supervisor Interrupt Enabled" : "Supervisor Interrupt Disabled");
|
||||
rt_kprintf("\t%s\n",(regs -> xstatus & SSTATUS_SPIE) ? "Last Time Supervisor Interrupt Enabled" : "Last Time Supervisor Interrupt Disabled");
|
||||
rt_kprintf("\t%s\n",(regs -> xstatus & SSTATUS_SPP) ? "Last Privilege is Supervisor Mode" : "Last Privilege is User Mode");
|
||||
rt_kprintf("\t%s\n",(regs -> xstatus & SSTATUS_PUM) ? "Permit to Access User Page" : "Not Permit to Access User Page");
|
||||
rt_kprintf("\t%s\n",(regs -> xstatus & (1 << 19)) ? "Permit to Read Executable-only Page" : "Not Permit to Read Executable-only Page");
|
||||
rt_size_t satp_v = read_csr(satp);
|
||||
rt_kprintf("satp = 0x%p\n",satp_v);
|
||||
const char *mode_str = "Unknown Address Translation/Protection Mode";
|
||||
|
||||
switch(__MASKVALUE(satp_v >> 60,__MASK(4)))
|
||||
{
|
||||
case 0:
|
||||
mode_str = "No Address Translation/Protection Mode";
|
||||
break;
|
||||
|
||||
case 8:
|
||||
mode_str = "Page-based 39-bit Virtual Addressing Mode";
|
||||
break;
|
||||
|
||||
case 9:
|
||||
mode_str = "Page-based 48-bit Virtual Addressing Mode";
|
||||
break;
|
||||
}
|
||||
|
||||
rt_kprintf("\tMode = %s\n",mode_str);
|
||||
rt_kprintf("-----------------Dump OK---------------------\n");
|
||||
}
|
||||
|
||||
void handle_trap(rt_size_t xcause,rt_size_t xtval,rt_size_t xepc,struct rt_hw_stack_frame *sp)
|
||||
{
|
||||
int cause = (xcause & 0xFFFFFFFF);
|
||||
int plic_irq = 0;
|
||||
if (xcause & (1UL << 63))
|
||||
{
|
||||
switch (cause)
|
||||
{
|
||||
case IRQ_M_SOFT:
|
||||
{
|
||||
|
||||
}
|
||||
break;
|
||||
case IRQ_M_TIMER:
|
||||
tick_isr();
|
||||
break;
|
||||
case IRQ_S_TIMER:
|
||||
tick_isr();
|
||||
break;
|
||||
case IRQ_S_EXT:
|
||||
plic_irq = plic_claim();
|
||||
plic_complete(plic_irq);
|
||||
irq_desc[plic_irq].handler(plic_irq, irq_desc[plic_irq].param);
|
||||
break;
|
||||
case IRQ_M_EXT:
|
||||
plic_irq = plic_claim();
|
||||
plic_complete(plic_irq);
|
||||
irq_desc[plic_irq].handler(plic_irq, irq_desc[plic_irq].param);
|
||||
break;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
rt_thread_t tid;
|
||||
extern long list_thread();
|
||||
|
||||
rt_hw_interrupt_disable();
|
||||
|
||||
rt_kprintf("xcause = %08x,xtval = %08x,xepc = %08x\n", xcause, xtval, xepc);
|
||||
tid = rt_thread_self();
|
||||
rt_kprintf("\nException:\n");
|
||||
switch (cause)
|
||||
{
|
||||
case CAUSE_MISALIGNED_FETCH:
|
||||
rt_kprintf("Instruction address misaligned");
|
||||
break;
|
||||
case CAUSE_FAULT_FETCH:
|
||||
rt_kprintf("Instruction access fault");
|
||||
break;
|
||||
case CAUSE_ILLEGAL_INSTRUCTION:
|
||||
rt_kprintf("Illegal instruction");
|
||||
break;
|
||||
case CAUSE_BREAKPOINT:
|
||||
rt_kprintf("Breakpoint");
|
||||
break;
|
||||
case CAUSE_MISALIGNED_LOAD:
|
||||
rt_kprintf("Load address misaligned");
|
||||
break;
|
||||
case CAUSE_FAULT_LOAD:
|
||||
rt_kprintf("Load access fault");
|
||||
break;
|
||||
case CAUSE_MISALIGNED_STORE:
|
||||
rt_kprintf("Store address misaligned");
|
||||
break;
|
||||
case CAUSE_FAULT_STORE:
|
||||
rt_kprintf("Store access fault");
|
||||
break;
|
||||
case CAUSE_USER_ECALL:
|
||||
rt_kprintf("Environment call from U-mode");
|
||||
break;
|
||||
case CAUSE_SUPERVISOR_ECALL:
|
||||
rt_kprintf("Environment call from S-mode");
|
||||
break;
|
||||
case CAUSE_HYPERVISOR_ECALL:
|
||||
rt_kprintf("Environment call from H-mode");
|
||||
break;
|
||||
case CAUSE_MACHINE_ECALL:
|
||||
rt_kprintf("Environment call from M-mode");
|
||||
break;
|
||||
default:
|
||||
rt_kprintf("Uknown exception : %08lX", cause);
|
||||
break;
|
||||
}
|
||||
rt_kprintf("\n");
|
||||
dump_regs(sp);
|
||||
rt_kprintf("exception pc => 0x%08x\n", xepc);
|
||||
rt_kprintf("current thread: %.*s\n", RT_NAME_MAX, tid->name);
|
||||
#ifdef RT_USING_FINSH
|
||||
list_thread();
|
||||
#endif
|
||||
while(1);
|
||||
}
|
||||
rt_hw_interrupt_enable(0);
|
||||
}
|
||||
|
|
@ -0,0 +1,27 @@
|
|||
/*
|
||||
* Copyright (c) 2006-2021, RT-Thread Development Team
|
||||
*
|
||||
* SPDX-License-Identifier: Apache-2.0
|
||||
*
|
||||
* Change Logs:
|
||||
* Date Author Notes
|
||||
* 2021-05-20 bigmagic The first version
|
||||
*/
|
||||
|
||||
#ifndef INTERRUPT_H__
|
||||
#define INTERRUPT_H__
|
||||
|
||||
#include <rthw.h>
|
||||
#include "stack.h"
|
||||
|
||||
int rt_hw_clint_ipi_enable(void);
|
||||
int rt_hw_clint_ipi_disable(void);
|
||||
int rt_hw_plic_irq_enable(int irq_number);
|
||||
int rt_hw_plic_irq_disable(int irq_number);
|
||||
void rt_hw_interrupt_init(void);
|
||||
void rt_hw_interrupt_mask(int vector);
|
||||
rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
|
||||
void *param, const char *name);
|
||||
void handle_trap(rt_size_t xcause,rt_size_t xtval,rt_size_t xepc,struct rt_hw_stack_frame *sp);
|
||||
|
||||
#endif
|
||||
|
|
@ -11,31 +11,125 @@
|
|||
*/
|
||||
|
||||
#include "cpuport.h"
|
||||
#include "encoding.h"
|
||||
#include "stackframe.h"
|
||||
|
||||
.section .text.entry
|
||||
.align 2
|
||||
.global trap_entry
|
||||
.extern __stack_cpu0
|
||||
.extern get_current_thread_kernel_stack_top
|
||||
trap_entry:
|
||||
//backup sp
|
||||
csrrw sp, sscratch, sp
|
||||
//load interrupt stack
|
||||
la sp, __stack_cpu0
|
||||
//backup context
|
||||
SAVE_ALL
|
||||
#ifdef ARCH_RISCV_FPU
|
||||
addi sp, sp, -32 * FREGBYTES
|
||||
|
||||
RESTORE_SYS_GP
|
||||
FSTORE f0, 0 * FREGBYTES(sp)
|
||||
FSTORE f1, 1 * FREGBYTES(sp)
|
||||
FSTORE f2, 2 * FREGBYTES(sp)
|
||||
FSTORE f3, 3 * FREGBYTES(sp)
|
||||
FSTORE f4, 4 * FREGBYTES(sp)
|
||||
FSTORE f5, 5 * FREGBYTES(sp)
|
||||
FSTORE f6, 6 * FREGBYTES(sp)
|
||||
FSTORE f7, 7 * FREGBYTES(sp)
|
||||
FSTORE f8, 8 * FREGBYTES(sp)
|
||||
FSTORE f9, 9 * FREGBYTES(sp)
|
||||
FSTORE f10, 10 * FREGBYTES(sp)
|
||||
FSTORE f11, 11 * FREGBYTES(sp)
|
||||
FSTORE f12, 12 * FREGBYTES(sp)
|
||||
FSTORE f13, 13 * FREGBYTES(sp)
|
||||
FSTORE f14, 14 * FREGBYTES(sp)
|
||||
FSTORE f15, 15 * FREGBYTES(sp)
|
||||
FSTORE f16, 16 * FREGBYTES(sp)
|
||||
FSTORE f17, 17 * FREGBYTES(sp)
|
||||
FSTORE f18, 18 * FREGBYTES(sp)
|
||||
FSTORE f19, 19 * FREGBYTES(sp)
|
||||
FSTORE f20, 20 * FREGBYTES(sp)
|
||||
FSTORE f21, 21 * FREGBYTES(sp)
|
||||
FSTORE f22, 22 * FREGBYTES(sp)
|
||||
FSTORE f23, 23 * FREGBYTES(sp)
|
||||
FSTORE f24, 24 * FREGBYTES(sp)
|
||||
FSTORE f25, 25 * FREGBYTES(sp)
|
||||
FSTORE f26, 26 * FREGBYTES(sp)
|
||||
FSTORE f27, 27 * FREGBYTES(sp)
|
||||
FSTORE f28, 28 * FREGBYTES(sp)
|
||||
FSTORE f29, 29 * FREGBYTES(sp)
|
||||
FSTORE f30, 30 * FREGBYTES(sp)
|
||||
FSTORE f31, 31 * FREGBYTES(sp)
|
||||
|
||||
csrr a0, scause
|
||||
csrrc a1, stval, zero
|
||||
csrr a2, sepc
|
||||
mv a3, sp
|
||||
#endif
|
||||
|
||||
/* scause, stval, sepc, sp */
|
||||
/* save thread context to thread stack */
|
||||
addi sp, sp, -32 * REGBYTES
|
||||
|
||||
STORE x1, 1 * REGBYTES(sp)
|
||||
|
||||
csrr x1, SRC_XSTATUS
|
||||
STORE x1, 2 * REGBYTES(sp)
|
||||
|
||||
csrr x1, SRC_XEPC
|
||||
STORE x1, 0 * REGBYTES(sp)
|
||||
|
||||
STORE x4, 4 * REGBYTES(sp)
|
||||
STORE x5, 5 * REGBYTES(sp)
|
||||
STORE x6, 6 * REGBYTES(sp)
|
||||
STORE x7, 7 * REGBYTES(sp)
|
||||
STORE x8, 8 * REGBYTES(sp)
|
||||
STORE x9, 9 * REGBYTES(sp)
|
||||
STORE x10, 10 * REGBYTES(sp)
|
||||
STORE x11, 11 * REGBYTES(sp)
|
||||
STORE x12, 12 * REGBYTES(sp)
|
||||
STORE x13, 13 * REGBYTES(sp)
|
||||
STORE x14, 14 * REGBYTES(sp)
|
||||
STORE x15, 15 * REGBYTES(sp)
|
||||
STORE x16, 16 * REGBYTES(sp)
|
||||
STORE x17, 17 * REGBYTES(sp)
|
||||
STORE x18, 18 * REGBYTES(sp)
|
||||
STORE x19, 19 * REGBYTES(sp)
|
||||
STORE x20, 20 * REGBYTES(sp)
|
||||
STORE x21, 21 * REGBYTES(sp)
|
||||
STORE x22, 22 * REGBYTES(sp)
|
||||
STORE x23, 23 * REGBYTES(sp)
|
||||
STORE x24, 24 * REGBYTES(sp)
|
||||
STORE x25, 25 * REGBYTES(sp)
|
||||
STORE x26, 26 * REGBYTES(sp)
|
||||
STORE x27, 27 * REGBYTES(sp)
|
||||
STORE x28, 28 * REGBYTES(sp)
|
||||
STORE x29, 29 * REGBYTES(sp)
|
||||
STORE x30, 30 * REGBYTES(sp)
|
||||
STORE x31, 31 * REGBYTES(sp)
|
||||
|
||||
/* switch to interrupt stack */
|
||||
move s0, sp
|
||||
|
||||
#ifndef RISCV_S_MODE
|
||||
/* get cpu id */
|
||||
csrr t0, mhartid
|
||||
#else
|
||||
li t0, 0
|
||||
#endif
|
||||
|
||||
/* switch interrupt stack of current cpu */
|
||||
la sp, __stack_start__
|
||||
addi t1, t0, 1
|
||||
li t2, __STACKSIZE__
|
||||
mul t1, t1, t2
|
||||
add sp, sp, t1 /* sp = (cpuid + 1) * __STACKSIZE__ + __stack_start__ */
|
||||
|
||||
/* handle interrupt */
|
||||
call rt_interrupt_enter
|
||||
csrr a0, SRC_XCAUSE
|
||||
csrr a1, SRC_XEPC
|
||||
mv a2, s0
|
||||
call handle_trap
|
||||
call rt_interrupt_leave
|
||||
|
||||
#ifdef RT_USING_SMP
|
||||
/* s0 --> sp */
|
||||
mv sp, s0
|
||||
mv a0, s0
|
||||
call rt_scheduler_do_irq_switch
|
||||
tail rt_hw_context_switch_exit
|
||||
|
||||
#else
|
||||
|
||||
/* switch to from_thread stack */
|
||||
move sp, s0
|
||||
|
||||
/* need to switch new thread */
|
||||
la s0, rt_thread_switch_interrupt_flag
|
||||
|
|
@ -43,41 +137,6 @@ trap_entry:
|
|||
beqz s2, spurious_interrupt
|
||||
sw zero, 0(s0)
|
||||
|
||||
.global rt_hw_context_switch_interrupt_do
|
||||
rt_hw_context_switch_interrupt_do:
|
||||
|
||||
//switch to thread kernel stack
|
||||
csrr t0, sstatus
|
||||
andi t0, t0, 0x100
|
||||
beqz t0, __restore_sp_from_tcb_interrupt
|
||||
|
||||
__restore_sp_from_sscratch_interrupt:
|
||||
csrr t0, sscratch
|
||||
j __move_stack_context_interrupt
|
||||
|
||||
__restore_sp_from_tcb_interrupt:
|
||||
la s0, rt_interrupt_from_thread
|
||||
LOAD a0, 0(s0)
|
||||
jal rt_thread_sp_to_thread
|
||||
jal get_thread_kernel_stack_top
|
||||
mv t0, a0
|
||||
|
||||
__move_stack_context_interrupt:
|
||||
mv t1, sp//src
|
||||
mv sp, t0//switch stack
|
||||
addi sp, sp, -33 * REGBYTES
|
||||
//copy context
|
||||
li s0, 33//cnt
|
||||
mv t2, sp//dst
|
||||
|
||||
copy_context_loop_interrupt:
|
||||
LOAD t0, 0(t1)
|
||||
STORE t0, 0(t2)
|
||||
addi s0, s0, -1
|
||||
addi t1, t1, 8
|
||||
addi t2, t2, 8
|
||||
bnez s0, copy_context_loop_interrupt
|
||||
|
||||
la s0, rt_interrupt_from_thread
|
||||
LOAD s1, 0(s0)
|
||||
STORE sp, 0(s1)
|
||||
|
|
@ -86,16 +145,7 @@ copy_context_loop_interrupt:
|
|||
LOAD s1, 0(s0)
|
||||
LOAD sp, 0(s1)
|
||||
|
||||
#endif
|
||||
|
||||
spurious_interrupt:
|
||||
RESTORE_ALL
|
||||
sret
|
||||
|
||||
.global rt_hw_interrupt_enable
|
||||
rt_hw_interrupt_enable:
|
||||
csrs sstatus, a0
|
||||
jr ra
|
||||
|
||||
.global rt_hw_interrupt_disable
|
||||
rt_hw_interrupt_disable:
|
||||
csrrci a0, sstatus, 2
|
||||
jr ra
|
||||
tail rt_hw_context_switch_exit
|
||||
|
|
|
|||
|
|
@ -10,25 +10,45 @@
|
|||
#ifndef __RISCV_IO_H__
|
||||
#define __RISCV_IO_H__
|
||||
|
||||
// which hart (core) is this?
|
||||
static inline uint32_t r_mhartid()
|
||||
{
|
||||
#ifndef RISCV_S_MODE
|
||||
uint32_t x;
|
||||
asm volatile("csrr %0, mhartid" : "=r" (x) );
|
||||
return x;
|
||||
#else
|
||||
return 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
static inline void __raw_writeb(rt_uint8_t val, volatile void *addr)
|
||||
{
|
||||
asm volatile("sb %0, 0(%1)" : : "r"(val), "r"(addr));
|
||||
asm volatile("sb %0, 0(%1)"
|
||||
:
|
||||
: "r"(val), "r"(addr));
|
||||
}
|
||||
|
||||
static inline void __raw_writew(rt_uint16_t val, volatile void *addr)
|
||||
{
|
||||
asm volatile("sh %0, 0(%1)" : : "r"(val), "r"(addr));
|
||||
asm volatile("sh %0, 0(%1)"
|
||||
:
|
||||
: "r"(val), "r"(addr));
|
||||
}
|
||||
|
||||
static inline void __raw_writel(rt_uint32_t val, volatile void *addr)
|
||||
{
|
||||
asm volatile("sw %0, 0(%1)" : : "r"(val), "r"(addr));
|
||||
asm volatile("sw %0, 0(%1)"
|
||||
:
|
||||
: "r"(val), "r"(addr));
|
||||
}
|
||||
|
||||
#if __riscv_xlen != 32
|
||||
static inline void __raw_writeq(rt_uint64_t val, volatile void *addr)
|
||||
{
|
||||
asm volatile("sd %0, 0(%1)" : : "r"(val), "r"(addr));
|
||||
asm volatile("sd %0, 0(%1)"
|
||||
:
|
||||
: "r"(val), "r"(addr));
|
||||
}
|
||||
#endif
|
||||
|
||||
|
|
@ -36,7 +56,9 @@
|
|||
{
|
||||
rt_uint8_t val;
|
||||
|
||||
asm volatile("lb %0, 0(%1)" : "=r"(val) : "r"(addr));
|
||||
asm volatile("lb %0, 0(%1)"
|
||||
: "=r"(val)
|
||||
: "r"(addr));
|
||||
return val;
|
||||
}
|
||||
|
||||
|
|
@ -44,7 +66,9 @@
|
|||
{
|
||||
rt_uint16_t val;
|
||||
|
||||
asm volatile("lh %0, 0(%1)" : "=r"(val) : "r"(addr));
|
||||
asm volatile("lh %0, 0(%1)"
|
||||
: "=r"(val)
|
||||
: "r"(addr));
|
||||
return val;
|
||||
}
|
||||
|
||||
|
|
@ -52,7 +76,9 @@
|
|||
{
|
||||
rt_uint32_t val;
|
||||
|
||||
asm volatile("lw %0, 0(%1)" : "=r"(val) : "r"(addr));
|
||||
asm volatile("lw %0, 0(%1)"
|
||||
: "=r"(val)
|
||||
: "r"(addr));
|
||||
return val;
|
||||
}
|
||||
|
||||
|
|
@ -61,7 +87,9 @@
|
|||
{
|
||||
rt_uint64_t val;
|
||||
|
||||
asm volatile("ld %0, 0(%1)" : "=r"(val) : "r"(addr));
|
||||
asm volatile("ld %0, 0(%1)"
|
||||
: "=r"(val)
|
||||
: "r"(addr));
|
||||
return val;
|
||||
}
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -16,7 +16,7 @@ struct rt_hw_stack_frame
|
|||
{
|
||||
rt_ubase_t epc; /* epc - epc - program counter */
|
||||
rt_ubase_t ra; /* x1 - ra - return address for jumps */
|
||||
rt_ubase_t sstatus; /* - supervisor status register */
|
||||
rt_ubase_t xstatus; /* - supervisor/machine/user status register */
|
||||
rt_ubase_t gp; /* x3 - gp - global pointer */
|
||||
rt_ubase_t tp; /* x4 - tp - thread pointer */
|
||||
rt_ubase_t t0; /* x5 - t0 - temporary register 0 */
|
||||
|
|
|
|||
|
|
@ -19,10 +19,10 @@
|
|||
|
||||
STORE x1, 1 * REGBYTES(sp)
|
||||
|
||||
csrr x1, sstatus
|
||||
csrr x1, SRC_XSTATUS
|
||||
STORE x1, 2 * REGBYTES(sp)
|
||||
|
||||
csrr x1, sepc
|
||||
csrr x1, SRC_XEPC
|
||||
STORE x1, 0 * REGBYTES(sp)
|
||||
|
||||
STORE x3, 3 * REGBYTES(sp)
|
||||
|
|
@ -54,17 +54,17 @@
|
|||
STORE x29, 29 * REGBYTES(sp)
|
||||
STORE x30, 30 * REGBYTES(sp)
|
||||
STORE x31, 31 * REGBYTES(sp)
|
||||
csrr t0, sscratch
|
||||
csrr t0, SRC_XSCRATCH
|
||||
STORE t0, 32 * REGBYTES(sp)
|
||||
.endm
|
||||
|
||||
.macro RESTORE_ALL_ONLY
|
||||
/* resw ra to sepc */
|
||||
LOAD x1, 0 * REGBYTES(sp)
|
||||
csrw sepc, x1
|
||||
csrw SRC_XEPC, x1
|
||||
|
||||
LOAD x1, 2 * REGBYTES(sp)
|
||||
csrw sstatus, x1
|
||||
csrw SRC_XSTATUS, x1
|
||||
|
||||
LOAD x1, 1 * REGBYTES(sp)
|
||||
|
||||
|
|
@ -104,10 +104,10 @@
|
|||
.macro RESTORE_ALL
|
||||
/* resw ra to sepc */
|
||||
LOAD x1, 0 * REGBYTES(sp)
|
||||
csrw sepc, x1
|
||||
csrw SRC_XEPC, x1
|
||||
|
||||
LOAD x1, 2 * REGBYTES(sp)
|
||||
csrw sstatus, x1
|
||||
csrw SRC_XSTATUS, x1
|
||||
|
||||
LOAD x1, 1 * REGBYTES(sp)
|
||||
|
||||
|
|
@ -152,12 +152,4 @@
|
|||
.option pop
|
||||
.endm
|
||||
|
||||
.macro OPEN_INTERRUPT
|
||||
csrsi sstatus, 2
|
||||
.endm
|
||||
|
||||
.macro CLOSE_INTERRUPT
|
||||
csrci sstatus, 2
|
||||
.endm
|
||||
|
||||
#endif
|
||||
|
|
@ -10,71 +10,48 @@
|
|||
* 2020/6/12 Xim Port to QEMU and remove SMP support
|
||||
*/
|
||||
|
||||
#define SSTATUS_FS 0x00006000U /* initial state of FPU, clear to disable */
|
||||
#define XSTATUS_FS (3 << 13) /* initial state of FPU, clear to disable */
|
||||
#define XSTATUS_PUM (1 << 18)
|
||||
#include <cpuport.h>
|
||||
|
||||
.global _start
|
||||
.section ".start", "ax"
|
||||
_start:
|
||||
j 1f
|
||||
.word 0xdeadbeef
|
||||
.align 3
|
||||
.global g_wake_up
|
||||
g_wake_up:
|
||||
.dword 1
|
||||
.dword 0
|
||||
1:
|
||||
csrw sie, 0
|
||||
csrw sip, 0
|
||||
la t0, trap_entry
|
||||
csrw stvec, t0
|
||||
#ifndef RISCV_S_MODE
|
||||
# setup stacks per hart
|
||||
csrr t0, mhartid # read current hart id
|
||||
slli t0, t0, 10 # shift left the hart id by 1024
|
||||
|
||||
li x1, 0
|
||||
li x2, 0
|
||||
li x3, 0
|
||||
li x4, 0
|
||||
li x5, 0
|
||||
li x6, 0
|
||||
li x7, 0
|
||||
li x8, 0
|
||||
li x9, 0
|
||||
li x10,0
|
||||
li x11,0
|
||||
li x12,0
|
||||
li x13,0
|
||||
li x14,0
|
||||
li x15,0
|
||||
li x16,0
|
||||
li x17,0
|
||||
li x18,0
|
||||
li x19,0
|
||||
li x20,0
|
||||
li x21,0
|
||||
li x22,0
|
||||
li x23,0
|
||||
li x24,0
|
||||
li x25,0
|
||||
li x26,0
|
||||
li x27,0
|
||||
li x28,0
|
||||
li x29,0
|
||||
li x30,0
|
||||
li x31,0
|
||||
# park harts with id != 0
|
||||
csrr a0, mhartid # read current hart id
|
||||
bnez a0, park # if we're not on the hart 0
|
||||
#endif
|
||||
|
||||
csrw SRC_XIE, 0 # clear Interrupt Registers
|
||||
csrw SRC_XIP, 0
|
||||
|
||||
la t0, trap_entry
|
||||
csrw SRC_XTVEC, t0 # set Trap Vector Base Address Register
|
||||
|
||||
/* set to disable FPU */
|
||||
li t0, SSTATUS_FS
|
||||
csrc sstatus, t0
|
||||
li t0, 0x40000 // SUM in sstatus
|
||||
csrs sstatus, t0
|
||||
li t0, XSTATUS_FS # close fpu
|
||||
csrc SRC_XSTATUS, t0
|
||||
#ifdef RISCV_S_MODE
|
||||
li t0, XSTATUS_PUM # PUM has no effect
|
||||
csrs SRC_XSTATUS, t0
|
||||
#endif
|
||||
|
||||
.option push
|
||||
.option norelax
|
||||
la gp, __global_pointer$
|
||||
.option pop
|
||||
|
||||
// removed SMP support here
|
||||
la sp, __stack_start__
|
||||
li t0, __STACKSIZE__
|
||||
add sp, sp, t0
|
||||
csrw sscratch, sp
|
||||
csrw SRC_XSCRATCH, sp
|
||||
j primary_cpu_entry
|
||||
|
||||
park:
|
||||
wfi
|
||||
j park
|
||||
|
|
@ -11,8 +11,12 @@
|
|||
#include <rthw.h>
|
||||
#include <rtthread.h>
|
||||
|
||||
#include <encoding.h>
|
||||
#include "sbi.h"
|
||||
#include "tick.h"
|
||||
#include <riscv_io.h>
|
||||
#include <encoding.h>
|
||||
|
||||
#define VIRT_CLINT_TIMEBASE_FREQ (10000000)
|
||||
|
||||
static volatile uint64_t time_elapsed = 0;
|
||||
static volatile unsigned long tick_cycles = 0;
|
||||
|
|
@ -27,11 +31,14 @@ static uint64_t get_ticks()
|
|||
|
||||
int tick_isr(void)
|
||||
{
|
||||
// uint64_t core_id = current_coreid();
|
||||
int tick_cycles = 40000;
|
||||
// clint->mtimecmp[core_id] += tick_cycles;
|
||||
int tick_cycles = VIRT_CLINT_TIMEBASE_FREQ / RT_TICK_PER_SECOND;
|
||||
rt_tick_increase();
|
||||
#ifdef RISCV_S_MODE
|
||||
sbi_set_timer(get_ticks() + tick_cycles);
|
||||
#else
|
||||
int id = r_mhartid();
|
||||
*(uint64_t*)CLINT_MTIMECMP(id) = *(uint64_t*)CLINT_MTIME + tick_cycles;
|
||||
#endif
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -39,10 +46,9 @@ int tick_isr(void)
|
|||
/* Sets and enable the timer interrupt */
|
||||
int rt_hw_tick_init(void)
|
||||
{
|
||||
/* Read core id */
|
||||
// unsigned long core_id = current_coreid();
|
||||
unsigned long interval = 1000/RT_TICK_PER_SECOND;
|
||||
unsigned long interval = VIRT_CLINT_TIMEBASE_FREQ / RT_TICK_PER_SECOND;
|
||||
|
||||
#ifdef RISCV_S_MODE
|
||||
/* Clear the Supervisor-Timer bit in SIE */
|
||||
clear_csr(sie, SIP_STIP);
|
||||
|
||||
|
|
@ -54,6 +60,12 @@ int rt_hw_tick_init(void)
|
|||
|
||||
/* Enable the Supervisor-Timer bit in SIE */
|
||||
set_csr(sie, SIP_STIP);
|
||||
|
||||
#else
|
||||
clear_csr(mie, MIP_MTIP);
|
||||
clear_csr(mip, MIP_MTIP);
|
||||
int id = r_mhartid();
|
||||
*(uint64_t*)CLINT_MTIMECMP(id) = *(uint64_t*)CLINT_MTIME + interval;
|
||||
set_csr(mie, MIP_MTIP);
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -11,6 +11,11 @@
|
|||
#ifndef TICK_H__
|
||||
#define TICK_H__
|
||||
|
||||
//ask the CLINT for a timer interrupt.
|
||||
#define CLINT (0x2000000L)
|
||||
#define CLINT_MTIMECMP(hartid) (CLINT + 0x4000 + 4*(hartid))
|
||||
#define CLINT_MTIME (CLINT + 0xBFF8) // cycles since boot.
|
||||
|
||||
int tick_isr(void);
|
||||
int rt_hw_tick_init(void);
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue