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feat: libcpu/risc-v: unify interrupt & IO on rv64 

This patch aims to unify the two currently separated RISC-V 64-bit
architecture ports, 'virt64' and 'c906', into a single generic
'common64' port. The changes include renaming files and updating
includes to use a unified 'interrupt.h' header, as well as making
adjustments to IO and trap handling to be more consistent between the
two architectures.

Changes:
- Renamed 'rt_interrupt.h' to 'interrupt.h' and updated includes accordingly.
- Unified IO register access functions in 'riscv_io.h'.
- Added 'opcode.h' for portable assembly support.
- Updated 'plic.c' and 'plic.h' to handle interrupts in a unified manner.
- Modified 'trap.c' to handle exceptions and interrupts consistently for 'rv64'.

Signed-off-by: Shell <smokewood@qq.com>
This commit is contained in:
Shell 2024-09-02 18:02:15 +08:00 committed by Meco Man
parent a00aaab2ba
commit e244c196c4
13 changed files with 442 additions and 347 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libcpu/risc-v/t-head/c906/interrupt.c
View File

@ -11,7 +11,7 @@
#include <rthw.h>
#include <rtthread.h>
#include "rt_interrupt.h"
#include "interrupt.h"
#include "riscv.h"
#include "plic.h"

0
libcpu/risc-v/t-head/c906/rt_interrupt.h → libcpu/risc-v/t-head/c906/interrupt.h
View File

2
libcpu/risc-v/t-head/c906/plic.c
View File

@ -15,7 +15,7 @@
#include <rtdbg.h>
#include "plic.h"
#include "rt_interrupt.h"
#include "interrupt.h"
#include "io.h"
#include "encoding.h"
#include "ioremap.h"

2
libcpu/risc-v/t-head/c906/plic.h
View File

@ -12,7 +12,7 @@
#ifndef __RISCV64_PLIC_H__
#define __RISCV64_PLIC_H__
#include <rt_interrupt.h>
#include <interrupt.h>
#ifndef C906_PLIC_PHY_ADDR
#define C906_PLIC_PHY_ADDR (0x10000000)

13
libcpu/risc-v/t-head/c906/riscv.h
View File

@ -1,11 +1,12 @@
/*
* Copyright (c) 2006-2021, RT-Thread Development Team
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-01-30 lizhirui first version
* 2024-08-28 RT-Thread Fit into rv64ilp32 ABI
*/
#ifndef __RISCV_H__
@ -13,13 +14,15 @@
#include <encoding.h>
#define __SIZE(bit) (1UL << (bit))
#define __MASK(bit) (__SIZE(bit) - 1UL)
/* using unsigned long long for the case of rv64ilp32 */
#define __SIZE(bit) (1ULL << (bit))
#define __MASK(bit) (__SIZE(bit) - 1ULL)
#define __UMASK(bit) (~(__MASK(bit)))
#define __MASKVALUE(value,maskvalue) ((value) & (maskvalue))
#define __UMASKVALUE(value,maskvalue) ((value) & (~(maskvalue)))
#define __CHECKUPBOUND(value,bit_count) (!(((rt_size_t)value) & (~__MASK(bit_count))))
#define __CHECKALIGN(value,start_bit) (!(((rt_size_t)value) & (__MASK(start_bit))))
#define __CHECKUPBOUND(value,bit_count) (!(((rt_ubase_t)value) & (~__MASK(bit_count))))
#define __CHECKALIGN(value,start_bit) (!(((rt_ubase_t)value) & (__MASK(start_bit))))
#define __PARTBIT(value,start_bit,length) (((value) >> (start_bit)) & __MASK(length))

6
libcpu/risc-v/t-head/c906/riscv_io.h
View File

@ -10,6 +10,12 @@
#ifndef __RISCV_IO_H__
#define __RISCV_IO_H__
static inline uint32_t __raw_hartid(void)
{
extern int boot_hartid;
return boot_hartid;
}
static inline void __raw_writeb(rt_uint8_t val, volatile void *addr)
{
asm volatile("sb %0, 0(%1)" : : "r"(val), "r"(addr));

166
libcpu/risc-v/t-head/c906/trap.c
View File

@ -1,36 +1,29 @@
/*
* Copyright (c) 2006-2021, RT-Thread Development Team
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021/1/30 lizirui first version
* 2021/10/20 JasonHu move to trap.c
* 2022-12-08 RT-Thread first version
*/
#include <rthw.h>
#include <rtthread.h>
#include <stdint.h>
#include "board.h"
#include "tick.h"
#include <mm_fault.h>
#include "mmu.h"
#include "encoding.h"
#include "stack.h"
#include "sbi.h"
#include "riscv.h"
#include "rt_interrupt.h"
#include "plic.h"
#include <mmu.h>
#include <encoding.h>
#include <stack.h>
#include <sbi.h>
#include <riscv.h>
#include <interrupt.h>
#include <plic.h>
#include <tick.h>
#ifdef RT_USING_SMART
#include <lwp_arch.h>
void rt_hw_backtrace(rt_uint32_t *ffp, rt_ubase_t sepc);
#else
#define rt_hw_backtrace(...) (0)
#endif
#define DBG_TAG "libcpu.trap"
@ -42,7 +35,8 @@ 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("\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);
@ -62,15 +56,27 @@ void dump_regs(struct rt_hw_stack_frame *regs)
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("sstatus = 0x%p\n", regs->sstatus);
rt_kprintf("\t%s\n", (regs->sstatus & SSTATUS_SIE) ? "Supervisor Interrupt Enabled" : "Supervisor Interrupt Disabled");
rt_kprintf("\t%s\n", (regs->sstatus & SSTATUS_SPIE) ? "Last Time Supervisor Interrupt Enabled" : "Last Time Supervisor Interrupt Disabled");
rt_kprintf("\t%s\n", (regs->sstatus & SSTATUS_SPP) ? "Last Privilege is Supervisor Mode" : "Last Privilege is User Mode");
rt_kprintf("\t%s\n", (regs->sstatus & SSTATUS_SUM) ? "Permit to Access User Page" : "Not Permit to Access User Page");
rt_kprintf("\t%s\n", (regs->sstatus & (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("\t%s\n", (regs->sstatus & SSTATUS_SIE)
? "Supervisor Interrupt Enabled"
: "Supervisor Interrupt Disabled");
rt_kprintf("\t%s\n", (regs->sstatus & SSTATUS_SPIE)
? "Last Time Supervisor Interrupt Enabled"
: "Last Time Supervisor Interrupt Disabled");
rt_kprintf("\t%s\n", (regs->sstatus & SSTATUS_SPP)
? "Last Privilege is Supervisor Mode"
: "Last Privilege is User Mode");
rt_kprintf("\t%s\n", (regs->sstatus & SSTATUS_SUM)
? "Permit to Access User Page"
: "Not Permit to Access User Page");
rt_kprintf("\t%s\n", (regs->sstatus & (1 << 19))
? "Permit to Read Executable-only Page"
: "Not Permit to Read Executable-only Page");
rt_ubase_t satp_v = read_csr(satp);
rt_kprintf("satp = 0x%p\n", satp_v);
rt_kprintf("\tCurrent Page Table(Physical) = 0x%p\n", __MASKVALUE(satp_v, __MASK(44)) << PAGE_OFFSET_BIT);
rt_kprintf("\tCurrent ASID = 0x%p\n", __MASKVALUE(satp_v >> 44, __MASK(16)) << PAGE_OFFSET_BIT);
rt_kprintf("\tCurrent Page Table(Physical) = 0x%p\n",
__MASKVALUE(satp_v, __MASK(44)) << PAGE_OFFSET_BIT);
rt_kprintf("\tCurrent ASID = 0x%p\n", __MASKVALUE(satp_v >> 44, __MASK(16))
<< PAGE_OFFSET_BIT);
const char *mode_str = "Unknown Address Translation/Protection Mode";
switch (__MASKVALUE(satp_v >> 60, __MASK(4)))
@ -92,9 +98,7 @@ void dump_regs(struct rt_hw_stack_frame *regs)
rt_kprintf("-----------------Dump OK---------------------\n");
}
static const char *Exception_Name[] =
{
"Instruction Address Misaligned",
static const char *Exception_Name[] = {"Instruction Address Misaligned",
"Instruction Access Fault",
"Illegal Instruction",
"Breakpoint",
@ -111,8 +115,7 @@ static const char *Exception_Name[] =
"Reserved-14",
"Store/AMO Page Fault"};
static const char *Interrupt_Name[] =
{
static const char *Interrupt_Name[] = {
"User Software Interrupt",
"Supervisor Software Interrupt",
"Reversed-2",
@ -129,13 +132,10 @@ static const char *Interrupt_Name[] =
#ifndef RT_USING_SMP
static volatile int nested = 0;
#define ENTER_TRAP \
nested += 1
#define EXIT_TRAP \
nested -= 1
#define ENTER_TRAP nested += 1
#define EXIT_TRAP nested -= 1
#define CHECK_NESTED_PANIC(cause, tval, epc, eframe) \
if (nested != 1) \
handle_nested_trap_panic(cause, tval, epc, eframe)
if (nested != 1) handle_nested_trap_panic(cause, tval, epc, eframe)
#endif /* RT_USING_SMP */
static const char *get_exception_msg(int id)
@ -153,9 +153,11 @@ static const char *get_exception_msg(int id)
}
#ifdef RT_USING_SMART
void handle_user(rt_size_t scause, rt_size_t stval, rt_size_t sepc, struct rt_hw_stack_frame *sp)
#include "lwp.h"
void handle_user(rt_ubase_t scause, rt_ubase_t stval, rt_ubase_t sepc,
struct rt_hw_stack_frame *sp)
{
rt_size_t id = __MASKVALUE(scause, __MASK(63UL));
rt_ubase_t id = __MASKVALUE(scause, __MASK(63UL));
struct rt_lwp *lwp;
/* user page fault */
@ -165,11 +167,11 @@ void handle_user(rt_size_t scause, rt_size_t stval, rt_size_t sepc, struct rt_hw
{
case EP_LOAD_PAGE_FAULT:
fault_op = MM_FAULT_OP_READ;
fault_type = MM_FAULT_TYPE_PAGE_FAULT;
fault_type = MM_FAULT_TYPE_GENERIC_MMU;
break;
case EP_LOAD_ACCESS_FAULT:
fault_op = MM_FAULT_OP_READ;
fault_type = MM_FAULT_TYPE_GENERIC;
fault_type = MM_FAULT_TYPE_BUS_ERROR;
break;
case EP_LOAD_ADDRESS_MISALIGNED:
fault_op = MM_FAULT_OP_READ;
@ -177,11 +179,11 @@ void handle_user(rt_size_t scause, rt_size_t stval, rt_size_t sepc, struct rt_hw
break;
case EP_STORE_PAGE_FAULT:
fault_op = MM_FAULT_OP_WRITE;
fault_type = MM_FAULT_TYPE_PAGE_FAULT;
fault_type = MM_FAULT_TYPE_GENERIC_MMU;
break;
case EP_STORE_ACCESS_FAULT:
fault_op = MM_FAULT_OP_WRITE;
fault_type = MM_FAULT_TYPE_GENERIC;
fault_type = MM_FAULT_TYPE_BUS_ERROR;
break;
case EP_STORE_ADDRESS_MISALIGNED:
fault_op = MM_FAULT_OP_WRITE;
@ -189,11 +191,11 @@ void handle_user(rt_size_t scause, rt_size_t stval, rt_size_t sepc, struct rt_hw
break;
case EP_INSTRUCTION_PAGE_FAULT:
fault_op = MM_FAULT_OP_EXECUTE;
fault_type = MM_FAULT_TYPE_PAGE_FAULT;
fault_type = MM_FAULT_TYPE_GENERIC_MMU;
break;
case EP_INSTRUCTION_ACCESS_FAULT:
fault_op = MM_FAULT_OP_EXECUTE;
fault_type = MM_FAULT_TYPE_GENERIC;
fault_type = MM_FAULT_TYPE_BUS_ERROR;
break;
case EP_INSTRUCTION_ADDRESS_MISALIGNED:
fault_op = MM_FAULT_OP_EXECUTE;
@ -225,16 +227,19 @@ void handle_user(rt_size_t scause, rt_size_t stval, rt_size_t sepc, struct rt_hw
LOG_E("scause:0x%p,stval:0x%p,sepc:0x%p\n", scause, stval, sepc);
dump_regs(sp);
rt_hw_backtrace((uint32_t *)sp->s0_fp, sepc);
rt_thread_t cur_thr = rt_thread_self();
struct rt_hw_backtrace_frame frame = {.fp = sp->s0_fp, .pc = sepc};
rt_kprintf("fp = %p\n", frame.fp);
lwp_backtrace_frame(cur_thr, &frame);
LOG_E("User Fault, killing thread: %s", rt_thread_self()->parent.name);
LOG_E("User Fault, killing thread: %s", cur_thr->parent.name);
EXIT_TRAP;
sys_exit_group(-1);
}
#endif
#ifdef ENABLE_VECTOR
#ifdef ARCH_RISCV_VECTOR
static void vector_enable(struct rt_hw_stack_frame *sp)
{
sp->sstatus |= SSTATUS_VS_INITIAL;
@ -243,7 +248,8 @@ static void vector_enable(struct rt_hw_stack_frame *sp)
/**
* detect V/D support, and do not distinguish V/D instruction
*/
static int illegal_inst_recoverable(rt_ubase_t stval, struct rt_hw_stack_frame *sp)
static int illegal_inst_recoverable(rt_ubase_t stval,
struct rt_hw_stack_frame *sp)
{
// first 7 bits is opcode
int opcode = stval & 0x7f;
@ -271,10 +277,8 @@ static int illegal_inst_recoverable(rt_ubase_t stval, struct rt_hw_stack_frame *
}
#endif
static void handle_nested_trap_panic(
rt_size_t cause,
rt_size_t tval,
rt_size_t epc,
static void handle_nested_trap_panic(rt_ubase_t cause, rt_ubase_t tval,
rt_ubase_t epc,
struct rt_hw_stack_frame *eframe)
{
LOG_E("\n-------- [SEVER ERROR] --------");
@ -288,18 +292,20 @@ static void handle_nested_trap_panic(
#define PAGE_FAULT (id == EP_LOAD_PAGE_FAULT || id == EP_STORE_PAGE_FAULT)
/* Trap entry */
void handle_trap(rt_size_t scause, rt_size_t stval, rt_size_t sepc, struct rt_hw_stack_frame *sp)
void handle_trap(rt_ubase_t scause, rt_ubase_t stval, rt_ubase_t sepc,
struct rt_hw_stack_frame *sp)
{
rt_size_t id = __MASKVALUE(scause,__MASK(63UL));
ENTER_TRAP;
rt_ubase_t id = __MASKVALUE(scause, __MASK(63UL));
const char *msg;
/* supervisor external interrupt */
if ((SCAUSE_INTERRUPT & scause) && SCAUSE_S_EXTERNAL_INTR == (scause & 0xff))
if ((SCAUSE_INTERRUPT & scause) &&
SCAUSE_S_EXTERNAL_INTR == (scause & 0xff))
{
rt_interrupt_enter();
plic_handle_irq();
rt_interrupt_leave();
return;
}
else if ((SCAUSE_INTERRUPT | SCAUSE_S_TIMER_INTR) == scause)
{
@ -307,9 +313,10 @@ void handle_trap(rt_size_t scause, rt_size_t stval, rt_size_t sepc, struct rt_hw
rt_interrupt_enter();
tick_isr();
rt_interrupt_leave();
return;
}
else if (SCAUSE_INTERRUPT & scause)
else
{
if (SCAUSE_INTERRUPT & scause)
{
if (id < sizeof(Interrupt_Name) / sizeof(const char *))
{
@ -319,32 +326,61 @@ void handle_trap(rt_size_t scause, rt_size_t stval, rt_size_t sepc, struct rt_hw
{
msg = "Unknown Interrupt";
}
LOG_E("Unhandled Interrupt %ld:%s\n", id, msg);
}
else
{
#ifdef ARCH_RISCV_VECTOR
if (scause == 0x2)
{
if (!(sp->sstatus & SSTATUS_VS) &&
illegal_inst_recoverable(stval, sp))
goto _exit;
}
#endif /* ARCH_RISCV_VECTOR */
#ifdef RT_USING_SMART
if (!(sp->sstatus & 0x100) || (PAGE_FAULT && IN_USER_SPACE))
{
handle_user(scause, stval, sepc, sp);
// if handle_user() return here, jump to u mode then
return ;
goto _exit;
}
#endif
// handle kernel exception:
rt_kprintf("Unhandled Exception %ld:%s\n", id, get_exception_msg(id));
rt_kprintf("Unhandled Exception %ld:%s\n", id,
get_exception_msg(id));
}
// trap cannot nested when handling another trap / interrupt
CHECK_NESTED_PANIC(scause, stval, sepc, sp);
rt_kprintf("scause:0x%p,stval:0x%p,sepc:0x%p\n", scause, stval, sepc);
dump_regs(sp);
rt_kprintf("--------------Thread list--------------\n");
rt_kprintf("current thread: %s\n", rt_thread_self()->parent.name);
extern struct rt_thread *rt_current_thread;
rt_thread_t cur_thr = rt_thread_self();
rt_kprintf("--------------Thread list--------------\n");
rt_kprintf("current thread: %s\n", cur_thr->parent.name);
rt_kprintf("--------------Backtrace--------------\n");
rt_hw_backtrace((uint32_t *)sp->s0_fp, sepc);
struct rt_hw_backtrace_frame frame = {.fp = sp->s0_fp, .pc = sepc};
#ifdef RT_USING_SMART
if (!(sp->sstatus & 0x100))
{
lwp_backtrace_frame(cur_thr, &frame);
}
else
#endif
{
rt_backtrace_frame(cur_thr, &frame);
}
while (1)
;
}
_exit:
EXIT_TRAP;
return;
}

4
libcpu/risc-v/virt64/io.h
View File

@ -40,13 +40,13 @@ static inline uint32_t readl(const volatile void *addr)
static inline void write_reg(
uint32_t val, volatile void *addr, unsigned offset)
{
writel(val, addr + offset);
writel(val, (void *)((rt_size_t)addr + offset));
}
static inline uint32_t read_reg(
const volatile void *addr, unsigned offset)
{
return readl(addr + offset);
return readl((void *)((rt_size_t)addr + offset));
}
#endif // ARCH_IO_H

40
libcpu/risc-v/virt64/opcode.h Normal file
View File

@ -0,0 +1,40 @@
/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-11-09 Shell Add portable asm support
*/
#ifndef __OPCODE_H__
#define __OPCODE_H__
/**
* @brief binary opcode pseudo operations
* Used to bypass toolchain restriction on extension ISA
*
*/
/**
* @brief RISC-V instruction formats
*/
/**
* R type: .insn r opcode6, func3, func7, rd, rs1, rs2
*
* +-------+-----+-----+-------+----+---------+
* | func7 | rs2 | rs1 | func3 | rd | opcode6 |
* +-------+-----+-----+-------+----+---------+
* 31 25 20 15 12 7 0
*/
#define __OPC_INSN_FORMAT_R(opcode, func3, func7, rd, rs1, rs2) \
".insn r "RT_STRINGIFY(opcode)","RT_STRINGIFY(func3)","RT_STRINGIFY(func7)","RT_STRINGIFY(rd)","RT_STRINGIFY(rs1)","RT_STRINGIFY(rs2)
#ifdef _TOOLCHAIN_SUPP_ZIFENCEI_ISA_
#define OPC_FENCE_I "fence.i"
#else /* !_TOOLCHAIN_SUPP_ZIFENCEI_ISA_ */
#define OPC_FENCE_I ".long 0x0000100F"
#endif /* _TOOLCHAIN_SUPP_ZIFENCEI_ISA_ */
#endif /* __OPCODE_H__ */

15
libcpu/risc-v/virt64/plic.c
View File

@ -14,6 +14,7 @@
#include "plic.h"
#include <riscv_io.h>
#include "encoding.h"
#include <interrupt.h>
#include <riscv.h>
#include <string.h>
@ -139,3 +140,17 @@ void plic_init()
// in a single core system, only current context was set
_set_sie(__raw_hartid());
}
extern struct rt_irq_desc irq_desc[MAX_HANDLERS];
/*
* Handling an interrupt is a two-step process: first you claim the interrupt
* by reading the claim register, then you complete the interrupt by writing
* that source ID back to the same claim register. This automatically enables
* and disables the interrupt, so there's nothing else to do.
*/
void plic_handle_irq(void)
{
int plic_irq = plic_claim();
plic_complete(plic_irq);
irq_desc[plic_irq].handler(plic_irq, irq_desc[plic_irq].param);
}

1
libcpu/risc-v/virt64/plic.h
View File

@ -72,5 +72,6 @@ void plic_complete(int irq);
void plic_set_thresh(rt_uint32_t val);
void plic_set_ie(rt_uint32_t word_index,rt_uint32_t val);
void plic_init();
void plic_handle_irq(void);
#endif

32
libcpu/risc-v/virt64/riscv_io.h
View File

@ -18,31 +18,23 @@ static inline uint32_t __raw_hartid(void)
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
@ -50,9 +42,7 @@ static inline rt_uint8_t __raw_readb(const volatile void *addr)
{
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;
}
@ -60,9 +50,7 @@ static inline rt_uint16_t __raw_readw(const volatile void *addr)
{
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;
}
@ -70,9 +58,7 @@ static inline rt_uint32_t __raw_readl(const volatile void *addr)
{
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;
}
@ -81,9 +67,7 @@ static inline rt_uint64_t __raw_readq(const volatile void *addr)
{
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

152
libcpu/risc-v/virt64/trap.c
View File

@ -7,24 +7,23 @@
* Date Author Notes
* 2022-12-08 RT-Thread first version
*/
#include <rthw.h>
#include <rtthread.h>
#include <stdint.h>
#include <mm_fault.h>
#include "mmu.h"
#include "encoding.h"
#include "stack.h"
#include "sbi.h"
#include "riscv.h"
#include "interrupt.h"
#include "plic.h"
#include "tick.h"
#include <mmu.h>
#include <encoding.h>
#include <stack.h>
#include <sbi.h>
#include <riscv.h>
#include <interrupt.h>
#include <plic.h>
#include <tick.h>
#ifdef RT_USING_SMART
#include <lwp_arch.h>
#else
#define rt_hw_backtrace(...) (0)
#endif
#define DBG_TAG "libcpu.trap"
@ -36,7 +35,8 @@ 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("\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);
@ -56,15 +56,27 @@ void dump_regs(struct rt_hw_stack_frame *regs)
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("sstatus = 0x%p\n", regs->sstatus);
rt_kprintf("\t%s\n", (regs->sstatus & SSTATUS_SIE) ? "Supervisor Interrupt Enabled" : "Supervisor Interrupt Disabled");
rt_kprintf("\t%s\n", (regs->sstatus & SSTATUS_SPIE) ? "Last Time Supervisor Interrupt Enabled" : "Last Time Supervisor Interrupt Disabled");
rt_kprintf("\t%s\n", (regs->sstatus & SSTATUS_SPP) ? "Last Privilege is Supervisor Mode" : "Last Privilege is User Mode");
rt_kprintf("\t%s\n", (regs->sstatus & SSTATUS_SUM) ? "Permit to Access User Page" : "Not Permit to Access User Page");
rt_kprintf("\t%s\n", (regs->sstatus & (1 << 19)) ? "Permit to Read Executable-only Page" : "Not Permit to Read Executable-only Page");
rt_kprintf("\t%s\n", (regs->sstatus & SSTATUS_SIE)
? "Supervisor Interrupt Enabled"
: "Supervisor Interrupt Disabled");
rt_kprintf("\t%s\n", (regs->sstatus & SSTATUS_SPIE)
? "Last Time Supervisor Interrupt Enabled"
: "Last Time Supervisor Interrupt Disabled");
rt_kprintf("\t%s\n", (regs->sstatus & SSTATUS_SPP)
? "Last Privilege is Supervisor Mode"
: "Last Privilege is User Mode");
rt_kprintf("\t%s\n", (regs->sstatus & SSTATUS_SUM)
? "Permit to Access User Page"
: "Not Permit to Access User Page");
rt_kprintf("\t%s\n", (regs->sstatus & (1 << 19))
? "Permit to Read Executable-only Page"
: "Not Permit to Read Executable-only Page");
rt_ubase_t satp_v = read_csr(satp);
rt_kprintf("satp = 0x%p\n", satp_v);
rt_kprintf("\tCurrent Page Table(Physical) = 0x%p\n", __MASKVALUE(satp_v, __MASK(44)) << PAGE_OFFSET_BIT);
rt_kprintf("\tCurrent ASID = 0x%p\n", __MASKVALUE(satp_v >> 44, __MASK(16)) << PAGE_OFFSET_BIT);
rt_kprintf("\tCurrent Page Table(Physical) = 0x%p\n",
__MASKVALUE(satp_v, __MASK(44)) << PAGE_OFFSET_BIT);
rt_kprintf("\tCurrent ASID = 0x%p\n", __MASKVALUE(satp_v >> 44, __MASK(16))
<< PAGE_OFFSET_BIT);
const char *mode_str = "Unknown Address Translation/Protection Mode";
switch (__MASKVALUE(satp_v >> 60, __MASK(4)))
@ -86,9 +98,7 @@ void dump_regs(struct rt_hw_stack_frame *regs)
rt_kprintf("-----------------Dump OK---------------------\n");
}
static const char *Exception_Name[] =
{
"Instruction Address Misaligned",
static const char *Exception_Name[] = {"Instruction Address Misaligned",
"Instruction Access Fault",
"Illegal Instruction",
"Breakpoint",
@ -105,8 +115,7 @@ static const char *Exception_Name[] =
"Reserved-14",
"Store/AMO Page Fault"};
static const char *Interrupt_Name[] =
{
static const char *Interrupt_Name[] = {
"User Software Interrupt",
"Supervisor Software Interrupt",
"Reversed-2",
@ -121,17 +130,12 @@ static const char *Interrupt_Name[] =
"Reserved-11",
};
extern struct rt_irq_desc irq_desc[];
#ifndef RT_USING_SMP
static volatile int nested = 0;
#define ENTER_TRAP \
nested += 1
#define EXIT_TRAP \
nested -= 1
#define ENTER_TRAP nested += 1
#define EXIT_TRAP nested -= 1
#define CHECK_NESTED_PANIC(cause, tval, epc, eframe) \
if (nested != 1) \
handle_nested_trap_panic(cause, tval, epc, eframe)
if (nested != 1) handle_nested_trap_panic(cause, tval, epc, eframe)
#endif /* RT_USING_SMP */
static const char *get_exception_msg(int id)
@ -150,7 +154,8 @@ static const char *get_exception_msg(int id)
#ifdef RT_USING_SMART
#include "lwp.h"
void handle_user(rt_ubase_t scause, rt_ubase_t stval, rt_ubase_t sepc, struct rt_hw_stack_frame *sp)
void handle_user(rt_ubase_t scause, rt_ubase_t stval, rt_ubase_t sepc,
struct rt_hw_stack_frame *sp)
{
rt_ubase_t id = __MASKVALUE(scause, __MASK(63UL));
struct rt_lwp *lwp;
@ -223,10 +228,7 @@ void handle_user(rt_ubase_t scause, rt_ubase_t stval, rt_ubase_t sepc, struct rt
dump_regs(sp);
rt_thread_t cur_thr = rt_thread_self();
struct rt_hw_backtrace_frame frame = {
.fp = sp->s0_fp,
.pc = sepc
};
struct rt_hw_backtrace_frame frame = {.fp = sp->s0_fp, .pc = sepc};
rt_kprintf("fp = %p\n", frame.fp);
lwp_backtrace_frame(cur_thr, &frame);
@ -237,7 +239,7 @@ void handle_user(rt_ubase_t scause, rt_ubase_t stval, rt_ubase_t sepc, struct rt
}
#endif
#ifdef ENABLE_VECTOR
#ifdef ARCH_RISCV_VECTOR
static void vector_enable(struct rt_hw_stack_frame *sp)
{
sp->sstatus |= SSTATUS_VS_INITIAL;
@ -246,7 +248,8 @@ static void vector_enable(struct rt_hw_stack_frame *sp)
/**
* detect V/D support, and do not distinguish V/D instruction
*/
static int illegal_inst_recoverable(rt_ubase_t stval, struct rt_hw_stack_frame *sp)
static int illegal_inst_recoverable(rt_ubase_t stval,
struct rt_hw_stack_frame *sp)
{
// first 7 bits is opcode
int opcode = stval & 0x7f;
@ -274,9 +277,7 @@ static int illegal_inst_recoverable(rt_ubase_t stval, struct rt_hw_stack_frame *
}
#endif
static void handle_nested_trap_panic(
rt_ubase_t cause,
rt_ubase_t tval,
static void handle_nested_trap_panic(rt_ubase_t cause, rt_ubase_t tval,
rt_ubase_t epc,
struct rt_hw_stack_frame *eframe)
{
@ -291,35 +292,31 @@ static void handle_nested_trap_panic(
#define PAGE_FAULT (id == EP_LOAD_PAGE_FAULT || id == EP_STORE_PAGE_FAULT)
/* Trap entry */
void handle_trap(rt_ubase_t scause, rt_ubase_t stval, rt_ubase_t sepc, struct rt_hw_stack_frame *sp)
void handle_trap(rt_ubase_t scause, rt_ubase_t stval, rt_ubase_t sepc,
struct rt_hw_stack_frame *sp)
{
ENTER_TRAP;
rt_ubase_t id = __MASKVALUE(scause, __MASK(63UL));
const char *msg;
/* supervisor external interrupt */
if (scause == (uint64_t)(0x8000000000000005))
if ((SCAUSE_INTERRUPT & scause) &&
SCAUSE_S_EXTERNAL_INTR == (scause & 0xff))
{
rt_interrupt_enter();
plic_handle_irq();
rt_interrupt_leave();
}
else if ((SCAUSE_INTERRUPT | SCAUSE_S_TIMER_INTR) == scause)
{
/* supervisor timer */
rt_interrupt_enter();
tick_isr();
rt_interrupt_leave();
}
else if (scause == (uint64_t)(0x8000000000000009))
{
rt_interrupt_enter();
int plic_irq = plic_claim();
plic_complete(plic_irq);
irq_desc[plic_irq].handler(plic_irq, irq_desc[plic_irq].param);
rt_interrupt_leave();
}
else
{
// trap cannot nested when handling another trap / interrupt
CHECK_NESTED_PANIC(scause, stval, sepc, sp);
rt_ubase_t id = __MASKVALUE(scause, __MASK(63UL));
const char *msg;
if (scause >> 63)
if (SCAUSE_INTERRUPT & scause)
{
if (id < sizeof(Interrupt_Name) / sizeof(const char *))
{
@ -330,17 +327,18 @@ void handle_trap(rt_ubase_t scause, rt_ubase_t stval, rt_ubase_t sepc, struct rt
msg = "Unknown Interrupt";
}
rt_kprintf("Unhandled Interrupt %ld:%s\n", id, msg);
LOG_E("Unhandled Interrupt %ld:%s\n", id, msg);
}
else
{
#ifdef ENABLE_VECTOR
#ifdef ARCH_RISCV_VECTOR
if (scause == 0x2)
{
if (!(sp->sstatus & SSTATUS_VS) && illegal_inst_recoverable(stval, sp))
if (!(sp->sstatus & SSTATUS_VS) &&
illegal_inst_recoverable(stval, sp))
goto _exit;
}
#endif /* ENABLE_VECTOR */
#endif /* ARCH_RISCV_VECTOR */
#ifdef RT_USING_SMART
if (!(sp->sstatus & 0x100) || (PAGE_FAULT && IN_USER_SPACE))
{
@ -351,24 +349,36 @@ void handle_trap(rt_ubase_t scause, rt_ubase_t stval, rt_ubase_t sepc, struct rt
#endif
// handle kernel exception:
rt_kprintf("Unhandled Exception %ld:%s\n", id, get_exception_msg(id));
rt_kprintf("Unhandled Exception %ld:%s\n", id,
get_exception_msg(id));
}
// trap cannot nested when handling another trap / interrupt
CHECK_NESTED_PANIC(scause, stval, sepc, sp);
rt_kprintf("scause:0x%p,stval:0x%p,sepc:0x%p\n", scause, stval, sepc);
dump_regs(sp);
rt_thread_t cur_thr = rt_thread_self();
rt_kprintf("--------------Thread list--------------\n");
rt_kprintf("current thread: %s\n", rt_thread_self()->parent.name);
rt_kprintf("current thread: %s\n", cur_thr->parent.name);
extern struct rt_thread *rt_current_thread;
rt_kprintf("--------------Backtrace--------------\n");
struct rt_hw_backtrace_frame frame = {
.fp = sp->s0_fp,
.pc = sepc
};
rt_kprintf("fp = %p", frame.fp);
rt_backtrace_frame(rt_thread_self(), &frame);
struct rt_hw_backtrace_frame frame = {.fp = sp->s0_fp, .pc = sepc};
RT_ASSERT(0);
#ifdef RT_USING_SMART
if (!(sp->sstatus & 0x100))
{
lwp_backtrace_frame(cur_thr, &frame);
}
else
#endif
{
rt_backtrace_frame(cur_thr, &frame);
}
while (1)
;
}
_exit:
EXIT_TRAP;