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feat: libcpu/risc-v: unify context on c906, virt64 

Changes:
- added config for NEW_CTX_SWITCH
- used new context on c906 sched switch routine
- update _rt_hw_stack_init to fit into NEW_CTX_SWITCH
- separated vector ctx from the generic

Signed-off-by: Shell <smokewood@qq.com>
This commit is contained in:
Shell 2024-09-02 16:38:42 +08:00 committed by Meco Man
parent adbbd24ad7
commit 7528645f59
25 changed files with 918 additions and 657 deletions
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1
bsp/qemu-virt64-riscv/Kconfig
View File

@ -28,6 +28,7 @@ config ENABLE_FPU
config ENABLE_VECTOR
bool "Using RISC-V Vector Extension"
select ARCH_RISCV_VECTOR
default n
if ENABLE_VECTOR

8
libcpu/Kconfig
View File

@ -245,6 +245,9 @@ config ARCH_RISCV
config ARCH_RISCV_FPU
bool
config ARCH_RISCV_VECTOR
bool
config ARCH_RISCV_FPU_S
select ARCH_RISCV_FPU
bool
@ -263,10 +266,15 @@ config ARCH_RISCV64
bool
if ARCH_RISCV64
config ARCH_USING_NEW_CTX_SWITCH
bool
default y
config ARCH_USING_RISCV_COMMON64
bool
depends on ARCH_RISCV64
select RT_USING_CPUTIME
select ARCH_USING_NEW_CTX_SWITCH
help
Using the common64 implementation under ./libcpu/risc-v
endif

216
libcpu/risc-v/t-head/c906/backtrace.c
View File

@ -1,137 +1,127 @@
/*
* Copyright (c) 2006-2018, RT-Thread Development Team
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023-10-18 Shell Add backtrace support
*/
#define DBG_TAG "hw.backtrace"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
#include <rtthread.h>
#include <mm_aspace.h>
#include "riscv_mmu.h"
#include "stack.h"
#define WORD sizeof(rt_base_t)
#define ARCH_CONTEXT_FETCH(pctx, id) (*(((unsigned long *)pctx) + (id)))
rt_inline rt_err_t _bt_kaddr(rt_ubase_t *fp, struct rt_hw_backtrace_frame *frame)
{
rt_err_t rc;
frame->fp = *(fp - 2);
frame->pc = *(fp - 1);
if ((rt_ubase_t)fp == frame->fp)
{
rc = -RT_ERROR;
}
else
{
rc = RT_EOK;
}
return rc;
}
#ifdef RT_USING_SMART
#include <lwp_arch.h>
#include <lwp_user_mm.h>
#define TRANCE_LEVEL 20
extern rt_ubase_t __text_start[];
extern rt_ubase_t __text_end[];
static char *_get_elf_name(size_t sepc);
void rt_hw_backtrace(rt_uint32_t *ffp, rt_ubase_t sepc)
rt_inline rt_err_t _bt_uaddr(rt_lwp_t lwp, rt_ubase_t *fp, struct rt_hw_backtrace_frame *frame)
{
rt_ubase_t *ra;
rt_ubase_t *fp;
rt_ubase_t vas, vae;
int i, j;
rt_kprintf("riscv64-unknown-linux-musl-addr2line -e %s -a -f", _get_elf_name(sepc));
fp = (rt_ubase_t *)ffp;
if (!fp)
rt_err_t rc;
if (lwp_data_get(lwp, &frame->fp, fp - 2, WORD) != WORD)
{
asm volatile("mv %0, s0"
: "=r"(fp));
rc = -RT_EFAULT;
}
if (sepc)
else if (lwp_data_get(lwp, &frame->pc, fp - 1, WORD) != WORD)
{
rt_kprintf(" %p", sepc - 0x4);
rc = -RT_EFAULT;
}
if (fp > (rt_ubase_t *)USER_VADDR_START && fp < (rt_ubase_t *)USER_VADDR_TOP)
else if ((rt_ubase_t)fp == frame->fp)
{
vas = USER_VADDR_START;
vae = USER_VADDR_TOP;
rc = -RT_ERROR;
}
else
{
vas = (rt_ubase_t)&__text_start;
vae = (rt_ubase_t)&__text_end;
frame->pc -= 0;
rc = RT_EOK;
}
for (i = j = 0; i < TRANCE_LEVEL; i++)
{
if (RT_ALIGN((rt_ubase_t)fp, sizeof(void *)) != (rt_ubase_t)fp)
{
break;
return rc;
}
ra = fp - 1;
if (!rt_kmem_v2p(ra) || *ra < vas || *ra > vae)
break;
rt_kprintf(" %p", *ra - 0x04);
fp = fp - 2;
if (!rt_kmem_v2p(fp))
break;
fp = (rt_ubase_t *)(*fp);
if (!fp)
break;
}
rt_kputs("\r\n");
}
static void _assert_backtrace_cb(const char *ex, const char *func, rt_size_t line)
{
rt_hw_interrupt_disable();
rt_kprintf("(%s) assertion failed at function:%s, line number:%d \n", ex, func, line);
rt_hw_backtrace(0, 0);
rt_hw_cpu_shutdown();
}
static int rt_hw_backtrace_init(void)
{
rt_assert_set_hook(_assert_backtrace_cb);
return 0;
}
INIT_BOARD_EXPORT(rt_hw_backtrace_init);
static void backtrace_test(int args, char *argv[])
{
int *p = (void *)-1;
init_fn_t ft = 0;
if (args < 2)
{
rt_kprintf("backtrace_test usage:backtrace_test a(assert)/m(invalid memory)/i(illegal instruction)\r\n");
return;
}
if (!rt_strcmp(argv[1], "a"))
{
rt_kprintf("Assert test:\r\n", argv[1]);
RT_ASSERT(0);
}
else if (!rt_strcmp(argv[1], "m"))
{
rt_kprintf("Access invalid memory:\r\n", argv[1]);
*p = 0;
}
else if (!rt_strcmp(argv[1], "i"))
{
rt_kprintf("Illegal instruction:\r\n", argv[1]);
ft();
}
else
{
rt_kprintf("Unknown cmd :%s.\r\n", argv[1]);
}
}
MSH_CMD_EXPORT(backtrace_test, backtrace test case);
extern struct rt_thread *rt_current_thread;
#define IN_USERSPACE (sepc > USER_VADDR_START && sepc < USER_VADDR_TOP)
static char *_get_elf_name(size_t sepc)
{
return IN_USERSPACE ? rt_current_thread->parent.name : "rtthread.elf";
}
#endif /* RT_USING_SMART */
rt_err_t rt_hw_backtrace_frame_unwind(rt_thread_t thread, struct rt_hw_backtrace_frame *frame)
{
rt_err_t rc = -RT_ERROR;
rt_uintptr_t *fp = (rt_uintptr_t *)frame->fp;
if (fp && !((long)fp & 0x7))
{
#ifdef RT_USING_SMART
if (thread->lwp)
{
void *lwp = thread->lwp;
void *this_lwp = lwp_self();
if (this_lwp == lwp && rt_hw_mmu_v2p(((rt_lwp_t)lwp)->aspace, fp) != ARCH_MAP_FAILED)
{
rc = _bt_kaddr(fp, frame);
}
else if (lwp_user_accessible_ext(lwp, (void *)fp, WORD))
{
rc = _bt_uaddr(lwp, fp, frame);
}
else
{
rc = -RT_EFAULT;
}
}
else
#endif
if ((rt_kmem_v2p(fp) != ARCH_MAP_FAILED))
{
rc = _bt_kaddr(fp, frame);
}
else
{
rc = -RT_EINVAL;
}
}
else
{
rc = -RT_EFAULT;
}
return rc;
}
rt_err_t rt_hw_backtrace_frame_get(rt_thread_t thread, struct rt_hw_backtrace_frame *frame)
{
rt_err_t rc;
if (!thread || !frame)
{
rc = -RT_EINVAL;
}
else
{
rt_hw_switch_frame_t sframe = thread->sp;
frame->pc = sframe->regs[RT_HW_SWITCH_CONTEXT_RA];
frame->fp = sframe->regs[RT_HW_SWITCH_CONTEXT_S0];;
rc = RT_EOK;
}
return rc;
}

85
libcpu/risc-v/t-head/c906/context_gcc.S
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2006-2021, RT-Thread Development Team
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
@ -8,11 +8,71 @@
* 2018/10/28 Bernard The unify RISC-V porting implementation
* 2018/12/27 Jesven Add SMP support
* 2021/02/02 lizhirui Add userspace support
* 2022/10/22 Shell Support User mode RVV;
* Trimming process switch context
*/
#include "cpuport.h"
#include "stackframe.h"
#define _REG_IDX(name) RT_HW_SWITCH_CONTEXT_##name
#define REG_IDX(name) _REG_IDX(name)
.macro SAVE_REG reg, index
STORE \reg, \index*REGBYTES(sp)
.endm
.macro LOAD_REG reg, index
LOAD \reg, \index*REGBYTES(sp)
.endm
.macro RESERVE_CONTEXT
addi sp, sp, -(RT_HW_SWITCH_CONTEXT_SIZE * REGBYTES)
SAVE_REG tp, REG_IDX(TP)
SAVE_REG ra, REG_IDX(RA)
SAVE_REG s0, REG_IDX(S0)
SAVE_REG s1, REG_IDX(S1)
SAVE_REG s2, REG_IDX(S2)
SAVE_REG s3, REG_IDX(S3)
SAVE_REG s4, REG_IDX(S4)
SAVE_REG s5, REG_IDX(S5)
SAVE_REG s6, REG_IDX(S6)
SAVE_REG s7, REG_IDX(S7)
SAVE_REG s8, REG_IDX(S8)
SAVE_REG s9, REG_IDX(S9)
SAVE_REG s10, REG_IDX(S10)
SAVE_REG s11, REG_IDX(S11)
csrr s11, sstatus
li s10, (SSTATUS_SPP)
or s11, s11, s10
SAVE_REG s11, REG_IDX(SSTATUS)
.endm
.macro RESTORE_CONTEXT
LOAD_REG s11, REG_IDX(SSTATUS)
csrw sstatus, s11
LOAD_REG s11, REG_IDX(S11)
LOAD_REG s10, REG_IDX(S10)
LOAD_REG s9, REG_IDX(S9)
LOAD_REG s8, REG_IDX(S8)
LOAD_REG s7, REG_IDX(S7)
LOAD_REG s6, REG_IDX(S6)
LOAD_REG s5, REG_IDX(S5)
LOAD_REG s4, REG_IDX(S4)
LOAD_REG s3, REG_IDX(S3)
LOAD_REG s2, REG_IDX(S2)
LOAD_REG s1, REG_IDX(S1)
LOAD_REG s0, REG_IDX(S0)
LOAD_REG ra, REG_IDX(RA)
LOAD_REG tp, REG_IDX(TP)
addi sp, sp, RT_HW_SWITCH_CONTEXT_SIZE * REGBYTES
csrw sepc, ra
.endm
/*
* void rt_hw_context_switch_to(rt_ubase_t to);
*
* a0 --> to SP pointer
*/
.globl rt_hw_context_switch_to
rt_hw_context_switch_to:
LOAD sp, (a0)
@ -24,31 +84,26 @@ rt_hw_context_switch_to:
jal lwp_aspace_switch
#endif
RESTORE_ALL
RESTORE_CONTEXT
sret
/*
* void rt_hw_context_switch(rt_ubase_t from, rt_ubase_t to);
*
* a0 --> from
* a1 --> to
* a0 --> from SP pointer
* a1 --> to SP pointer
*
* It should only be used on local interrupt disable
*/
.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
STORE t2, 32 * REGBYTES(sp)//save user_sp
RESERVE_CONTEXT
STORE sp, (a0)
//restore to thread context
// restore to thread SP
LOAD sp, (a1)
// restore Address Space
jal rt_thread_self
mv s1, a0
@ -56,5 +111,5 @@ rt_hw_context_switch:
jal lwp_aspace_switch
#endif
RESTORE_ALL
RESTORE_CONTEXT
sret

80
libcpu/risc-v/t-head/c906/cpuport.c
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2006-2021, RT-Thread Development Team
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
@ -14,9 +14,15 @@
#include <rtthread.h>
#include "cpuport.h"
#include "sbi.h"
#include "stack.h"
#include <sbi.h>
#include <encoding.h>
#ifdef ARCH_RISCV_FPU
#define K_SSTATUS_DEFAULT (SSTATUS_SPP | SSTATUS_SPIE | SSTATUS_SUM | SSTATUS_FS)
#else
#define K_SSTATUS_DEFAULT (SSTATUS_SPP | SSTATUS_SPIE | SSTATUS_SUM)
#endif
#ifdef RT_USING_SMART
#include <lwp_arch.h>
#endif
@ -37,10 +43,30 @@ volatile rt_ubase_t rt_interrupt_to_thread = 0;
*/
volatile rt_ubase_t rt_thread_switch_interrupt_flag = 0;
void *_rt_hw_stack_init(rt_ubase_t *sp, rt_ubase_t ra, rt_ubase_t sstatus)
{
rt_hw_switch_frame_t frame = (rt_hw_switch_frame_t)
((rt_ubase_t)sp - sizeof(struct rt_hw_switch_frame));
rt_memset(frame, 0, sizeof(struct rt_hw_switch_frame));
frame->regs[RT_HW_SWITCH_CONTEXT_RA] = ra;
frame->regs[RT_HW_SWITCH_CONTEXT_SSTATUS] = sstatus;
return (void *)frame;
}
int rt_hw_cpu_id(void)
{
return 0;
}
/**
* This function will initialize thread stack
* This function will initialize thread stack, we assuming
* when scheduler restore this new thread, context will restore
* an entry to user first application
*
* s0-s11, ra, sstatus, a0
* @param tentry the entry of thread
* @param parameter the parameter of entry
* @param stack_addr the beginning stack address
@ -53,36 +79,18 @@ rt_uint8_t *rt_hw_stack_init(void *tentry,
rt_uint8_t *stack_addr,
void *texit)
{
struct rt_hw_stack_frame *frame;
rt_uint8_t *stk;
int i;
extern int __global_pointer$;
rt_ubase_t *sp = (rt_ubase_t *)stack_addr;
// we use a strict alignment requirement for Q extension
sp = (rt_ubase_t *)RT_ALIGN_DOWN((rt_ubase_t)sp, 16);
stk = stack_addr + sizeof(rt_ubase_t);
stk = (rt_uint8_t *)RT_ALIGN_DOWN((rt_ubase_t)stk, REGBYTES);
stk -= sizeof(struct rt_hw_stack_frame);
(*--sp) = (rt_ubase_t)tentry;
(*--sp) = (rt_ubase_t)parameter;
(*--sp) = (rt_ubase_t)texit;
--sp; /* alignment */
frame = (struct rt_hw_stack_frame *)stk;
for (i = 0; i < sizeof(struct rt_hw_stack_frame) / sizeof(rt_ubase_t); i++)
{
((rt_ubase_t *)frame)[i] = 0xdeadbeef;
}
frame->ra = (rt_ubase_t)texit;
frame->gp = (rt_ubase_t)&__global_pointer$;
frame->a0 = (rt_ubase_t)parameter;
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 */
#ifdef ARCH_RISCV_FPU
frame->sstatus = 0x00046120; /* enable FPU */
#else
frame->sstatus = 0x00040120;
#endif
return stk;
/* compatible to RESTORE_CONTEXT */
extern void _rt_thread_entry(void);
return (rt_uint8_t *)_rt_hw_stack_init(sp, (rt_ubase_t)_rt_thread_entry, K_SSTATUS_DEFAULT);
}
/*
@ -112,13 +120,11 @@ void rt_hw_cpu_shutdown(void)
rt_kprintf("shutdown...\n");
level = rt_hw_interrupt_disable();
sbi_shutdown();
while (1);
}
int rt_hw_cpu_id(void)
{
return 0; /* d1 has one core */
sbi_shutdown();
while (1)
;
}
void rt_hw_set_process_id(int pid)

30
libcpu/risc-v/t-head/c906/cpuport.h
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2006-2021, RT-Thread Development Team
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
@ -14,28 +14,16 @@
#include <rtconfig.h>
#include <opcode.h>
/* bytes of register width */
#ifdef ARCH_CPU_64BIT
#define STORE sd
#define LOAD ld
#define REGBYTES 8
#else
// error here, not portable
#ifdef RT_USING_SMP
typedef union {
unsigned long slock;
struct __arch_tickets {
unsigned short owner;
unsigned short next;
} tickets;
} rt_hw_spinlock_t;
#endif
/* 33 general register */
#define CTX_GENERAL_REG_NR 33
#ifdef ARCH_RISCV_FPU
/* 32 fpu register */
#define CTX_FPU_REG_NR 32
#else
#define CTX_FPU_REG_NR 0
#endif
/* all context registers */
#define CTX_REG_NR (CTX_GENERAL_REG_NR + CTX_FPU_REG_NR)
#ifndef __ASSEMBLY__
#include <rtdef.h>

25
libcpu/risc-v/t-head/c906/cpuport_gcc.S Normal file
View File

@ -0,0 +1,25 @@
/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-10-19 RT-Thread the first version
*/
#include "cpuport.h"
#include "stackframe.h"
#include "asm-generic.h"
START_POINT(_rt_thread_entry)
LOAD ra, REGBYTES(sp) /* thread exit */
addi sp, sp, 2 * REGBYTES
LOAD a0, (sp) /* parameter */
LOAD t0, REGBYTES(sp) /* tentry */
addi sp, sp, 2 * REGBYTES
mv s1, ra
jalr t0
jalr s1
j . /* never here */
START_POINT_END(_rt_thread_entry)

17
libcpu/risc-v/t-head/c906/encoding.h
View File

@ -1,8 +1,25 @@
/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
*/
// See LICENSE for license details.
#ifndef RISCV_CSR_ENCODING_H
#define RISCV_CSR_ENCODING_H
#include <rtconfig.h>
#ifdef ARCH_RISCV_VECTOR
#include "vector_encoding.h"
#else
#define SSTATUS_VS 0 /* fallback */
#endif /* ARCH_RISCV_VECTOR */
#define MSTATUS_UIE 0x00000001
#define MSTATUS_SIE 0x00000002
#define MSTATUS_HIE 0x00000004

73
libcpu/risc-v/t-head/c906/ext_context.h Normal file
View File

@ -0,0 +1,73 @@
/*
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-10-10 RT-Thread the first version
*/
#ifndef __EXT_CONTEXT_H__
#define __EXT_CONTEXT_H__
#include <rtconfig.h>
#ifdef ARCH_RISCV_FPU
/* 32 fpu register */
#define CTX_FPU_REG_NR 32
#else
#define CTX_FPU_REG_NR 0
#endif /* ARCH_RISCV_FPU */
#ifdef __ASSEMBLY__
/**
* ==================================
* RISC-V D ISA (Floating)
* ==================================
*/
#ifdef ARCH_RISCV_FPU
#define FPU_CTX_F0_OFF (REGBYTES * 0) /* offsetof(fpu_context_t, fpustatus.f[0]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F1_OFF (REGBYTES * 1) /* offsetof(fpu_context_t, fpustatus.f[1]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F2_OFF (REGBYTES * 2) /* offsetof(fpu_context_t, fpustatus.f[2]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F3_OFF (REGBYTES * 3) /* offsetof(fpu_context_t, fpustatus.f[3]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F4_OFF (REGBYTES * 4) /* offsetof(fpu_context_t, fpustatus.f[4]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F5_OFF (REGBYTES * 5) /* offsetof(fpu_context_t, fpustatus.f[5]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F6_OFF (REGBYTES * 6) /* offsetof(fpu_context_t, fpustatus.f[6]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F7_OFF (REGBYTES * 7) /* offsetof(fpu_context_t, fpustatus.f[7]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F8_OFF (REGBYTES * 8) /* offsetof(fpu_context_t, fpustatus.f[8]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F9_OFF (REGBYTES * 9) /* offsetof(fpu_context_t, fpustatus.f[9]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F10_OFF (REGBYTES * 10) /* offsetof(fpu_context_t, fpustatus.f[10]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F11_OFF (REGBYTES * 11) /* offsetof(fpu_context_t, fpustatus.f[11]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F12_OFF (REGBYTES * 12) /* offsetof(fpu_context_t, fpustatus.f[12]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F13_OFF (REGBYTES * 13) /* offsetof(fpu_context_t, fpustatus.f[13]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F14_OFF (REGBYTES * 14) /* offsetof(fpu_context_t, fpustatus.f[14]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F15_OFF (REGBYTES * 15) /* offsetof(fpu_context_t, fpustatus.f[15]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F16_OFF (REGBYTES * 16) /* offsetof(fpu_context_t, fpustatus.f[16]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F17_OFF (REGBYTES * 17) /* offsetof(fpu_context_t, fpustatus.f[17]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F18_OFF (REGBYTES * 18) /* offsetof(fpu_context_t, fpustatus.f[18]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F19_OFF (REGBYTES * 19) /* offsetof(fpu_context_t, fpustatus.f[19]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F20_OFF (REGBYTES * 20) /* offsetof(fpu_context_t, fpustatus.f[20]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F21_OFF (REGBYTES * 21) /* offsetof(fpu_context_t, fpustatus.f[21]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F22_OFF (REGBYTES * 22) /* offsetof(fpu_context_t, fpustatus.f[22]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F23_OFF (REGBYTES * 23) /* offsetof(fpu_context_t, fpustatus.f[23]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F24_OFF (REGBYTES * 24) /* offsetof(fpu_context_t, fpustatus.f[24]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F25_OFF (REGBYTES * 25) /* offsetof(fpu_context_t, fpustatus.f[25]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F26_OFF (REGBYTES * 26) /* offsetof(fpu_context_t, fpustatus.f[26]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F27_OFF (REGBYTES * 27) /* offsetof(fpu_context_t, fpustatus.f[27]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F28_OFF (REGBYTES * 28) /* offsetof(fpu_context_t, fpustatus.f[28]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F29_OFF (REGBYTES * 29) /* offsetof(fpu_context_t, fpustatus.f[29]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F30_OFF (REGBYTES * 30) /* offsetof(fpu_context_t, fpustatus.f[30]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F31_OFF (REGBYTES * 31) /* offsetof(fpu_context_t, fpustatus.f[31]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#endif /* ARCH_RISCV_FPU */
#endif /* __ASSEMBLY__ */
#ifdef ARCH_RISCV_VECTOR
#include "rvv_context.h"
#else /* !ARCH_RISCV_VECTOR */
#define CTX_VECTOR_REG_NR 0
#endif /* ARCH_RISCV_VECTOR */
#endif /* __EXT_CONTEXT_H__ */

106
libcpu/risc-v/t-head/c906/interrupt_gcc.S
View File

@ -9,103 +9,81 @@
* 2018/12/27 Jesven Add SMP schedule
* 2021/02/02 lizhirui Add userspace support
* 2021/12/24 JasonHu Add user setting save/restore
* 2022/10/22 Shell Support kernel mode RVV;
* Rewrite trap handling routine
*/
#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
.global debug_check_sp
trap_entry:
//backup sp
// distingush exception from kernel or user
csrrw sp, sscratch, sp
//load interrupt stack
la sp, __stack_cpu0
//backup context
bnez sp, _save_context
// BE REALLY careful with sscratch,
// if it's wrong, we could looping here forever
// or accessing random memory and seeing things totally
// messy after a long time and don't even know why
_from_kernel:
csrr sp, sscratch
j _save_context
_save_context:
SAVE_ALL
// clear sscratch to say 'now in kernel mode'
csrw sscratch, zero
RESTORE_SYS_GP
#ifdef RT_USING_SMART
//check syscall
// now we are ready to enter interrupt / excepiton handler
_distinguish_syscall:
csrr t0, scause
li t1, 8//environment call from u-mode
#ifdef RT_USING_SMART
// TODO swap 8 with config macro name
li t1, 8
beq t0, t1, syscall_entry
// syscall never return here
#endif
csrr a0, scause
_handle_interrupt_and_exception:
mv a0, t0
csrrc a1, stval, zero
csrr a2, sepc
// sp as exception frame pointer
mv a3, sp
/* scause, stval, sepc, sp */
call handle_trap
/* need to switch new thread */
_interrupt_exit:
la s0, rt_thread_switch_interrupt_flag
lw s2, 0(s0)
beqz s2, spurious_interrupt
beqz s2, _resume_execution
sw zero, 0(s0)
.global rt_hw_context_switch_interrupt_do
rt_hw_context_switch_interrupt_do:
#ifdef RT_USING_SMART
//swap to thread kernel stack
_context_switch:
la t0, rt_interrupt_from_thread
LOAD a0, 0(t0)
la t0, rt_interrupt_to_thread
LOAD a1, 0(t0)
csrr t0, sstatus
andi t0, t0, 0x100
beqz t0, __restore_sp_from_tcb_interrupt
#endif
__restore_sp_from_sscratch_interrupt:
csrr t0, sscratch
j __move_stack_context_interrupt
andi t0, t0, ~SSTATUS_SPIE
csrw sstatus, t0
jal rt_hw_context_switch
_resume_execution:
#ifdef RT_USING_SMART
__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
LOAD t0, FRAME_OFF_SSTATUS(sp)
andi t0, t0, SSTATUS_SPP
beqz t0, arch_ret_to_user
#endif
__move_stack_context_interrupt:
mv t1, sp//src
mv sp, t0//switch stack
addi sp, sp, -CTX_REG_NR * REGBYTES
//copy context
li s0, CTX_REG_NR//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)
la s0, rt_interrupt_to_thread
LOAD s1, 0(s0)
LOAD sp, 0(s1)
#ifdef RT_USING_SMART
mv a0, s1
jal rt_thread_sp_to_thread
jal lwp_aspace_switch
#endif
spurious_interrupt:
_resume_kernel:
RESTORE_ALL
csrw sscratch, zero
sret
.global rt_hw_interrupt_enable

15
libcpu/risc-v/t-head/c906/stack.h
View File

@ -7,13 +7,22 @@
* Date Author Notes
* 2021-01-30 lizhirui first version
* 2021-11-18 JasonHu add fpu member
* 2022-10-22 Shell Support kernel mode RVV
*/
#ifndef __STACK_H__
#define __STACK_H__
#include "stackframe.h"
#include <rtthread.h>
typedef struct rt_hw_switch_frame
{
uint64_t regs[RT_HW_SWITCH_CONTEXT_SIZE];
} *rt_hw_switch_frame_t;
struct rt_hw_stack_frame
{
rt_ubase_t epc; /* epc - epc - program counter */
@ -49,9 +58,13 @@ struct rt_hw_stack_frame
rt_ubase_t t5; /* x30 - t5 - temporary register 5 */
rt_ubase_t t6; /* x31 - t6 - temporary register 6 */
rt_ubase_t user_sp_exc_stack; /* sscratch - user mode sp/exception stack */
rt_ubase_t __padding; /* align to 16bytes */
#ifdef ARCH_RISCV_FPU
rt_ubase_t f[CTX_FPU_REG_NR]; /* f0~f31 */
#endif
#endif /* ARCH_RISCV_FPU */
#ifdef ARCH_RISCV_VECTOR
rt_ubase_t v[CTX_VECTOR_REG_NR];
#endif /* ARCH_RISCV_VECTOR */
};
#endif

260
libcpu/risc-v/t-head/c906/stackframe.h
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2006-2021, RT-Thread Development Team
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
@ -8,61 +8,59 @@
* 2021-02-02 lizhirui first version
* 2021-02-11 lizhirui fixed gp save/store bug
* 2021-11-18 JasonHu add fpu registers save/restore
* 2022-10-22 Shell Support kernel mode RVV
*/
#ifndef __STACKFRAME_H__
#define __STACKFRAME_H__
#include <rtconfig.h>
#include "encoding.h"
#include "ext_context.h"
/* bytes of register width */
#ifdef ARCH_CPU_64BIT
#define STORE sd
#define LOAD ld
#define FSTORE fsd
#define FLOAD fld
#define REGBYTES 8
#else
// error here, not portable
#error "Not supported XLEN"
#endif
/* 33 general register + 1 padding */
#define CTX_GENERAL_REG_NR 34
/* all context registers */
#define CTX_REG_NR (CTX_GENERAL_REG_NR + CTX_FPU_REG_NR + CTX_VECTOR_REG_NR)
#define BYTES(idx) ((idx) * REGBYTES)
#define FRAME_OFF_SSTATUS BYTES(2)
#define FRAME_OFF_SP BYTES(32)
#define FRAME_OFF_GP BYTES(3)
#include "cpuport.h"
#include "encoding.h"
/* switch frame */
#define RT_HW_SWITCH_CONTEXT_SSTATUS 0
#define RT_HW_SWITCH_CONTEXT_S11 1
#define RT_HW_SWITCH_CONTEXT_S10 2
#define RT_HW_SWITCH_CONTEXT_S9 3
#define RT_HW_SWITCH_CONTEXT_S8 4
#define RT_HW_SWITCH_CONTEXT_S7 5
#define RT_HW_SWITCH_CONTEXT_S6 6
#define RT_HW_SWITCH_CONTEXT_S5 7
#define RT_HW_SWITCH_CONTEXT_S4 8
#define RT_HW_SWITCH_CONTEXT_S3 9
#define RT_HW_SWITCH_CONTEXT_S2 10
#define RT_HW_SWITCH_CONTEXT_S1 11
#define RT_HW_SWITCH_CONTEXT_S0 12
#define RT_HW_SWITCH_CONTEXT_RA 13
#define RT_HW_SWITCH_CONTEXT_TP 14
#define RT_HW_SWITCH_CONTEXT_ALIGNMENT 15 // Padding for alignment
#define RT_HW_SWITCH_CONTEXT_SIZE 16 // Total size of the structure
#ifdef ARCH_RISCV_FPU
#define FPU_CTX_F0_OFF 0 /* offsetof(fpu_context_t, fpustatus.f[0]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F1_OFF 8 /* offsetof(fpu_context_t, fpustatus.f[1]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F2_OFF 16 /* offsetof(fpu_context_t, fpustatus.f[2]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F3_OFF 24 /* offsetof(fpu_context_t, fpustatus.f[3]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F4_OFF 32 /* offsetof(fpu_context_t, fpustatus.f[4]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F5_OFF 40 /* offsetof(fpu_context_t, fpustatus.f[5]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F6_OFF 48 /* offsetof(fpu_context_t, fpustatus.f[6]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F7_OFF 56 /* offsetof(fpu_context_t, fpustatus.f[7]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F8_OFF 64 /* offsetof(fpu_context_t, fpustatus.f[8]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F9_OFF 72 /* offsetof(fpu_context_t, fpustatus.f[9]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F10_OFF 80 /* offsetof(fpu_context_t, fpustatus.f[10]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F11_OFF 88 /* offsetof(fpu_context_t, fpustatus.f[11]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F12_OFF 96 /* offsetof(fpu_context_t, fpustatus.f[12]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F13_OFF 104 /* offsetof(fpu_context_t, fpustatus.f[13]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F14_OFF 112 /* offsetof(fpu_context_t, fpustatus.f[14]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F15_OFF 120 /* offsetof(fpu_context_t, fpustatus.f[15]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F16_OFF 128 /* offsetof(fpu_context_t, fpustatus.f[16]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F17_OFF 136 /* offsetof(fpu_context_t, fpustatus.f[17]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F18_OFF 144 /* offsetof(fpu_context_t, fpustatus.f[18]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F19_OFF 152 /* offsetof(fpu_context_t, fpustatus.f[19]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F20_OFF 160 /* offsetof(fpu_context_t, fpustatus.f[20]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F21_OFF 168 /* offsetof(fpu_context_t, fpustatus.f[21]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F22_OFF 176 /* offsetof(fpu_context_t, fpustatus.f[22]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F23_OFF 184 /* offsetof(fpu_context_t, fpustatus.f[23]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F24_OFF 192 /* offsetof(fpu_context_t, fpustatus.f[24]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F25_OFF 200 /* offsetof(fpu_context_t, fpustatus.f[25]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F26_OFF 208 /* offsetof(fpu_context_t, fpustatus.f[26]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F27_OFF 216 /* offsetof(fpu_context_t, fpustatus.f[27]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F28_OFF 224 /* offsetof(fpu_context_t, fpustatus.f[28]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F29_OFF 232 /* offsetof(fpu_context_t, fpustatus.f[29]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F30_OFF 240 /* offsetof(fpu_context_t, fpustatus.f[30]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F31_OFF 248 /* offsetof(fpu_context_t, fpustatus.f[31]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#endif /* ARCH_RISCV_FPU */
/**
* The register `tp` always save/restore when context switch,
* we call `lwp_user_setting_save` when syscall enter,
* call `lwp_user_setting_restore` when syscall exit
* and modify context stack after `lwp_user_setting_restore` called
* so that the `tp` can be the correct thread area value.
*/
#ifdef __ASSEMBLY__
.macro SAVE_ALL
@ -70,13 +68,17 @@
/* reserve float registers */
addi sp, sp, -CTX_FPU_REG_NR * REGBYTES
#endif /* ARCH_RISCV_FPU */
#ifdef ARCH_RISCV_VECTOR
/* reserve float registers */
addi sp, sp, -CTX_VECTOR_REG_NR * REGBYTES
#endif /* ARCH_RISCV_VECTOR */
/* save general registers */
addi sp, sp, -CTX_GENERAL_REG_NR * REGBYTES
STORE x1, 1 * REGBYTES(sp)
csrr x1, sstatus
STORE x1, 2 * REGBYTES(sp)
STORE x1, FRAME_OFF_SSTATUS(sp)
csrr x1, sepc
STORE x1, 0 * REGBYTES(sp)
@ -120,38 +122,38 @@
li t0, SSTATUS_FS
csrs sstatus, t0
fsd f0, FPU_CTX_F0_OFF(t1)
fsd f1, FPU_CTX_F1_OFF(t1)
fsd f2, FPU_CTX_F2_OFF(t1)
fsd f3, FPU_CTX_F3_OFF(t1)
fsd f4, FPU_CTX_F4_OFF(t1)
fsd f5, FPU_CTX_F5_OFF(t1)
fsd f6, FPU_CTX_F6_OFF(t1)
fsd f7, FPU_CTX_F7_OFF(t1)
fsd f8, FPU_CTX_F8_OFF(t1)
fsd f9, FPU_CTX_F9_OFF(t1)
fsd f10, FPU_CTX_F10_OFF(t1)
fsd f11, FPU_CTX_F11_OFF(t1)
fsd f12, FPU_CTX_F12_OFF(t1)
fsd f13, FPU_CTX_F13_OFF(t1)
fsd f14, FPU_CTX_F14_OFF(t1)
fsd f15, FPU_CTX_F15_OFF(t1)
fsd f16, FPU_CTX_F16_OFF(t1)
fsd f17, FPU_CTX_F17_OFF(t1)
fsd f18, FPU_CTX_F18_OFF(t1)
fsd f19, FPU_CTX_F19_OFF(t1)
fsd f20, FPU_CTX_F20_OFF(t1)
fsd f21, FPU_CTX_F21_OFF(t1)
fsd f22, FPU_CTX_F22_OFF(t1)
fsd f23, FPU_CTX_F23_OFF(t1)
fsd f24, FPU_CTX_F24_OFF(t1)
fsd f25, FPU_CTX_F25_OFF(t1)
fsd f26, FPU_CTX_F26_OFF(t1)
fsd f27, FPU_CTX_F27_OFF(t1)
fsd f28, FPU_CTX_F28_OFF(t1)
fsd f29, FPU_CTX_F29_OFF(t1)
fsd f30, FPU_CTX_F30_OFF(t1)
fsd f31, FPU_CTX_F31_OFF(t1)
FSTORE f0, FPU_CTX_F0_OFF(t1)
FSTORE f1, FPU_CTX_F1_OFF(t1)
FSTORE f2, FPU_CTX_F2_OFF(t1)
FSTORE f3, FPU_CTX_F3_OFF(t1)
FSTORE f4, FPU_CTX_F4_OFF(t1)
FSTORE f5, FPU_CTX_F5_OFF(t1)
FSTORE f6, FPU_CTX_F6_OFF(t1)
FSTORE f7, FPU_CTX_F7_OFF(t1)
FSTORE f8, FPU_CTX_F8_OFF(t1)
FSTORE f9, FPU_CTX_F9_OFF(t1)
FSTORE f10, FPU_CTX_F10_OFF(t1)
FSTORE f11, FPU_CTX_F11_OFF(t1)
FSTORE f12, FPU_CTX_F12_OFF(t1)
FSTORE f13, FPU_CTX_F13_OFF(t1)
FSTORE f14, FPU_CTX_F14_OFF(t1)
FSTORE f15, FPU_CTX_F15_OFF(t1)
FSTORE f16, FPU_CTX_F16_OFF(t1)
FSTORE f17, FPU_CTX_F17_OFF(t1)
FSTORE f18, FPU_CTX_F18_OFF(t1)
FSTORE f19, FPU_CTX_F19_OFF(t1)
FSTORE f20, FPU_CTX_F20_OFF(t1)
FSTORE f21, FPU_CTX_F21_OFF(t1)
FSTORE f22, FPU_CTX_F22_OFF(t1)
FSTORE f23, FPU_CTX_F23_OFF(t1)
FSTORE f24, FPU_CTX_F24_OFF(t1)
FSTORE f25, FPU_CTX_F25_OFF(t1)
FSTORE f26, FPU_CTX_F26_OFF(t1)
FSTORE f27, FPU_CTX_F27_OFF(t1)
FSTORE f28, FPU_CTX_F28_OFF(t1)
FSTORE f29, FPU_CTX_F29_OFF(t1)
FSTORE f30, FPU_CTX_F30_OFF(t1)
FSTORE f31, FPU_CTX_F31_OFF(t1)
/* clr FS domain */
csrc sstatus, t0
@ -162,49 +164,77 @@
#endif /* ARCH_RISCV_FPU */
#ifdef ARCH_RISCV_VECTOR
csrr t0, sstatus
andi t0, t0, SSTATUS_VS
beqz t0, 0f
/* push vector frame */
addi t1, sp, (CTX_GENERAL_REG_NR + CTX_FPU_REG_NR) * REGBYTES
SAVE_VECTOR t1
0:
#endif /* ARCH_RISCV_VECTOR */
.endm
/**
* @brief Restore All General Registers, for interrupt handling
*
*/
.macro RESTORE_ALL
#ifdef ARCH_RISCV_VECTOR
// skip on close
ld t0, 2 * REGBYTES(sp)
// cannot use vector on initial
andi t0, t0, SSTATUS_VS_CLEAN
beqz t0, 0f
/* push vector frame */
addi t1, sp, (CTX_GENERAL_REG_NR + CTX_FPU_REG_NR) * REGBYTES
RESTORE_VECTOR t1
0:
#endif /* ARCH_RISCV_VECTOR */
#ifdef ARCH_RISCV_FPU
/* restore float register */
mv t2, sp
addi t2, t2, CTX_GENERAL_REG_NR * REGBYTES /* skip all normal reg */
addi t2, sp, CTX_GENERAL_REG_NR * REGBYTES
li t0, SSTATUS_FS
csrs sstatus, t0
fld f0, FPU_CTX_F0_OFF(t2)
fld f1, FPU_CTX_F1_OFF(t2)
fld f2, FPU_CTX_F2_OFF(t2)
fld f3, FPU_CTX_F3_OFF(t2)
fld f4, FPU_CTX_F4_OFF(t2)
fld f5, FPU_CTX_F5_OFF(t2)
fld f6, FPU_CTX_F6_OFF(t2)
fld f7, FPU_CTX_F7_OFF(t2)
fld f8, FPU_CTX_F8_OFF(t2)
fld f9, FPU_CTX_F9_OFF(t2)
fld f10, FPU_CTX_F10_OFF(t2)
fld f11, FPU_CTX_F11_OFF(t2)
fld f12, FPU_CTX_F12_OFF(t2)
fld f13, FPU_CTX_F13_OFF(t2)
fld f14, FPU_CTX_F14_OFF(t2)
fld f15, FPU_CTX_F15_OFF(t2)
fld f16, FPU_CTX_F16_OFF(t2)
fld f17, FPU_CTX_F17_OFF(t2)
fld f18, FPU_CTX_F18_OFF(t2)
fld f19, FPU_CTX_F19_OFF(t2)
fld f20, FPU_CTX_F20_OFF(t2)
fld f21, FPU_CTX_F21_OFF(t2)
fld f22, FPU_CTX_F22_OFF(t2)
fld f23, FPU_CTX_F23_OFF(t2)
fld f24, FPU_CTX_F24_OFF(t2)
fld f25, FPU_CTX_F25_OFF(t2)
fld f26, FPU_CTX_F26_OFF(t2)
fld f27, FPU_CTX_F27_OFF(t2)
fld f28, FPU_CTX_F28_OFF(t2)
fld f29, FPU_CTX_F29_OFF(t2)
fld f30, FPU_CTX_F30_OFF(t2)
fld f31, FPU_CTX_F31_OFF(t2)
FLOAD f0, FPU_CTX_F0_OFF(t2)
FLOAD f1, FPU_CTX_F1_OFF(t2)
FLOAD f2, FPU_CTX_F2_OFF(t2)
FLOAD f3, FPU_CTX_F3_OFF(t2)
FLOAD f4, FPU_CTX_F4_OFF(t2)
FLOAD f5, FPU_CTX_F5_OFF(t2)
FLOAD f6, FPU_CTX_F6_OFF(t2)
FLOAD f7, FPU_CTX_F7_OFF(t2)
FLOAD f8, FPU_CTX_F8_OFF(t2)
FLOAD f9, FPU_CTX_F9_OFF(t2)
FLOAD f10, FPU_CTX_F10_OFF(t2)
FLOAD f11, FPU_CTX_F11_OFF(t2)
FLOAD f12, FPU_CTX_F12_OFF(t2)
FLOAD f13, FPU_CTX_F13_OFF(t2)
FLOAD f14, FPU_CTX_F14_OFF(t2)
FLOAD f15, FPU_CTX_F15_OFF(t2)
FLOAD f16, FPU_CTX_F16_OFF(t2)
FLOAD f17, FPU_CTX_F17_OFF(t2)
FLOAD f18, FPU_CTX_F18_OFF(t2)
FLOAD f19, FPU_CTX_F19_OFF(t2)
FLOAD f20, FPU_CTX_F20_OFF(t2)
FLOAD f21, FPU_CTX_F21_OFF(t2)
FLOAD f22, FPU_CTX_F22_OFF(t2)
FLOAD f23, FPU_CTX_F23_OFF(t2)
FLOAD f24, FPU_CTX_F24_OFF(t2)
FLOAD f25, FPU_CTX_F25_OFF(t2)
FLOAD f26, FPU_CTX_F26_OFF(t2)
FLOAD f27, FPU_CTX_F27_OFF(t2)
FLOAD f28, FPU_CTX_F28_OFF(t2)
FLOAD f29, FPU_CTX_F29_OFF(t2)
FLOAD f30, FPU_CTX_F30_OFF(t2)
FLOAD f31, FPU_CTX_F31_OFF(t2)
/* clr FS domain */
csrc sstatus, t0
@ -216,6 +246,8 @@
#endif /* ARCH_RISCV_FPU */
/* restore general register */
addi t0, sp, CTX_REG_NR * REGBYTES
csrw sscratch, t0
/* resw ra to sepc */
LOAD x1, 0 * REGBYTES(sp)
@ -275,4 +307,6 @@
csrci sstatus, 2
.endm
#endif
#endif /* __ASSEMBLY__ */
#endif /* __STACKFRAME_H__ */

6
libcpu/risc-v/virt64/backtrace.c
View File

@ -15,6 +15,7 @@
#include <rtthread.h>
#include <mm_aspace.h>
#include "riscv_mmu.h"
#include "stack.h"
#define WORD sizeof(rt_base_t)
#define ARCH_CONTEXT_FETCH(pctx, id) (*(((unsigned long *)pctx) + (id)))
@ -117,8 +118,9 @@ rt_err_t rt_hw_backtrace_frame_get(rt_thread_t thread, struct rt_hw_backtrace_fr
}
else
{
frame->pc = ARCH_CONTEXT_FETCH(thread->sp, 13);
frame->fp = ARCH_CONTEXT_FETCH(thread->sp, 12);
rt_hw_switch_frame_t sframe = thread->sp;
frame->pc = sframe->regs[RT_HW_SWITCH_CONTEXT_RA];
frame->fp = sframe->regs[RT_HW_SWITCH_CONTEXT_S0];;
rc = RT_EOK;
}
return rc;

110
libcpu/risc-v/virt64/context_gcc.S
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2006-2021, RT-Thread Development Team
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
@ -8,63 +8,63 @@
* 2018/10/28 Bernard The unify RISC-V porting implementation
* 2018/12/27 Jesven Add SMP support
* 2021/02/02 lizhirui Add userspace support
* 2022/10/22 WangXiaoyao Support User mode RVV;
* 2022/10/22 Shell Support User mode RVV;
* Trimming process switch context
*/
#include "cpuport.h"
#include "stackframe.h"
#define _REG_IDX(name) RT_HW_SWITCH_CONTEXT_##name
#define REG_IDX(name) _REG_IDX(name)
.macro PUSH_REG reg
addi sp, sp, -REGBYTES
STORE \reg, (sp)
.macro SAVE_REG reg, index
STORE \reg, \index*REGBYTES(sp)
.endm
.macro POP_REG reg
LOAD \reg, (sp)
addi sp, sp, REGBYTES
.macro LOAD_REG reg, index
LOAD \reg, \index*REGBYTES(sp)
.endm
.macro RESERVE_CONTEXT
PUSH_REG tp
PUSH_REG ra
PUSH_REG s0
PUSH_REG s1
PUSH_REG s2
PUSH_REG s3
PUSH_REG s4
PUSH_REG s5
PUSH_REG s6
PUSH_REG s7
PUSH_REG s8
PUSH_REG s9
PUSH_REG s10
PUSH_REG s11
addi sp, sp, -(RT_HW_SWITCH_CONTEXT_SIZE * REGBYTES)
SAVE_REG tp, REG_IDX(TP)
SAVE_REG ra, REG_IDX(RA)
SAVE_REG s0, REG_IDX(S0)
SAVE_REG s1, REG_IDX(S1)
SAVE_REG s2, REG_IDX(S2)
SAVE_REG s3, REG_IDX(S3)
SAVE_REG s4, REG_IDX(S4)
SAVE_REG s5, REG_IDX(S5)
SAVE_REG s6, REG_IDX(S6)
SAVE_REG s7, REG_IDX(S7)
SAVE_REG s8, REG_IDX(S8)
SAVE_REG s9, REG_IDX(S9)
SAVE_REG s10, REG_IDX(S10)
SAVE_REG s11, REG_IDX(S11)
csrr s11, sstatus
li s10, (SSTATUS_SPP)
or s11, s11, s10
PUSH_REG s11
addi sp, sp, -REGBYTES
SAVE_REG s11, REG_IDX(SSTATUS)
.endm
.macro RESTORE_CONTEXT
addi sp, sp, REGBYTES
POP_REG s11
LOAD_REG s11, REG_IDX(SSTATUS)
csrw sstatus, s11
POP_REG s11
POP_REG s10
POP_REG s9
POP_REG s8
POP_REG s7
POP_REG s6
POP_REG s5
POP_REG s4
POP_REG s3
POP_REG s2
POP_REG s1
POP_REG s0
POP_REG ra
POP_REG tp
LOAD_REG s11, REG_IDX(S11)
LOAD_REG s10, REG_IDX(S10)
LOAD_REG s9, REG_IDX(S9)
LOAD_REG s8, REG_IDX(S8)
LOAD_REG s7, REG_IDX(S7)
LOAD_REG s6, REG_IDX(S6)
LOAD_REG s5, REG_IDX(S5)
LOAD_REG s4, REG_IDX(S4)
LOAD_REG s3, REG_IDX(S3)
LOAD_REG s2, REG_IDX(S2)
LOAD_REG s1, REG_IDX(S1)
LOAD_REG s0, REG_IDX(S0)
LOAD_REG ra, REG_IDX(RA)
LOAD_REG tp, REG_IDX(TP)
addi sp, sp, RT_HW_SWITCH_CONTEXT_SIZE * REGBYTES
csrw sepc, ra
.endm
@ -113,33 +113,3 @@ rt_hw_context_switch:
RESTORE_CONTEXT
sret
#ifdef ENABLE_VECTOR
/**
* @param a0 pointer to frame bottom
*/
.global rt_hw_vector_ctx_save
rt_hw_vector_ctx_save:
SAVE_VECTOR a0
ret
/**
* @param a0 pointer to frame bottom
*/
.global rt_hw_vector_ctx_restore
rt_hw_vector_ctx_restore:
RESTORE_VECTOR a0
ret
.global rt_hw_disable_vector
rt_hw_disable_vector:
li t0, SSTATUS_VS
csrc sstatus, t0
ret
.global rt_hw_enable_vector
rt_hw_enable_vector:
li t0, SSTATUS_VS
csrs sstatus, t0
ret
#endif /* ENABLE_VECTOR */

34
libcpu/risc-v/virt64/cpuport.c
View File

@ -7,6 +7,7 @@
* Date Author Notes
* 2018/10/28 Bernard The unify RISC-V porting code.
* 2021-02-11 lizhirui add gp support
* 2021-11-19 JasonHu add fpu support
*/
#include <rthw.h>
@ -17,7 +18,14 @@
#include <sbi.h>
#include <encoding.h>
#ifdef ARCH_RISCV_FPU
#define K_SSTATUS_DEFAULT (SSTATUS_SPP | SSTATUS_SPIE | SSTATUS_SUM | SSTATUS_FS)
#else
#define K_SSTATUS_DEFAULT (SSTATUS_SPP | SSTATUS_SPIE | SSTATUS_SUM)
#endif
#ifdef RT_USING_SMART
#include <lwp_arch.h>
#endif
/**
* @brief from thread used interrupt context switch
@ -37,24 +45,15 @@ volatile rt_ubase_t rt_thread_switch_interrupt_flag = 0;
void *_rt_hw_stack_init(rt_ubase_t *sp, rt_ubase_t ra, rt_ubase_t sstatus)
{
(*--sp) = 0; /* tp */
(*--sp) = ra; /* ra */
(*--sp) = 0; /* s0(fp) */
(*--sp) = 0; /* s1 */
(*--sp) = 0; /* s2 */
(*--sp) = 0; /* s3 */
(*--sp) = 0; /* s4 */
(*--sp) = 0; /* s5 */
(*--sp) = 0; /* s6 */
(*--sp) = 0; /* s7 */
(*--sp) = 0; /* s8 */
(*--sp) = 0; /* s9 */
(*--sp) = 0; /* s10 */
(*--sp) = 0; /* s11 */
(*--sp) = sstatus; /* sstatus */
--sp; /* align to 16bytes */
rt_hw_switch_frame_t frame = (rt_hw_switch_frame_t)
((rt_ubase_t)sp - sizeof(struct rt_hw_switch_frame));
return (void *)sp;
rt_memset(frame, 0, sizeof(struct rt_hw_switch_frame));
frame->regs[RT_HW_SWITCH_CONTEXT_RA] = ra;
frame->regs[RT_HW_SWITCH_CONTEXT_SSTATUS] = sstatus;
return (void *)frame;
}
int rt_hw_cpu_id(void)
@ -87,6 +86,7 @@ rt_uint8_t *rt_hw_stack_init(void *tentry,
(*--sp) = (rt_ubase_t)tentry;
(*--sp) = (rt_ubase_t)parameter;
(*--sp) = (rt_ubase_t)texit;
--sp; /* alignment */
/* compatible to RESTORE_CONTEXT */
extern void _rt_thread_entry(void);

48
libcpu/risc-v/virt64/cpuport.h
View File

@ -12,44 +12,7 @@
#define CPUPORT_H__
#include <rtconfig.h>
/* bytes of register width */
#ifdef ARCH_CPU_64BIT
#define STORE sd
#define LOAD ld
#define FSTORE fsd
#define FLOAD fld
#define REGBYTES 8
#else
// error here, not portable
#error "Not supported XLEN"
#endif
/* 33 general register + 1 padding */
#define CTX_GENERAL_REG_NR 34
#ifdef ENABLE_FPU
/* 32 fpu register */
#define CTX_FPU_REG_NR 32
#else
#define CTX_FPU_REG_NR 0
#endif
#ifdef ENABLE_VECTOR
#if defined(ARCH_VECTOR_VLEN_128)
#define CTX_VECTOR_REGS 64
#elif defined(ARCH_VECTOR_VLEN_256)
#define CTX_VECTOR_REGS 128
#endif
#define CTX_VECTOR_REG_NR (CTX_VECTOR_REGS + 4)
#else
#define CTX_VECTOR_REG_NR 0
#endif
/* all context registers */
#define CTX_REG_NR (CTX_GENERAL_REG_NR + CTX_FPU_REG_NR + CTX_VECTOR_REG_NR)
#include <opcode.h>
#ifdef RT_USING_SMP
typedef union {
@ -63,21 +26,24 @@ typedef union {
#ifndef __ASSEMBLY__
#include <rtdef.h>
rt_inline void rt_hw_dsb(void)
{
asm volatile("fence":::"memory");
__asm__ volatile("fence":::"memory");
}
rt_inline void rt_hw_dmb(void)
{
asm volatile("fence":::"memory");
__asm__ volatile("fence":::"memory");
}
rt_inline void rt_hw_isb(void)
{
asm volatile(".long 0x0000100F":::"memory");
__asm__ volatile(OPC_FENCE_I:::"memory");
}
int rt_hw_cpu_id(void);
#endif
#endif

9
libcpu/risc-v/virt64/cpuport_gcc.S
View File

@ -13,12 +13,11 @@
#include "asm-generic.h"
START_POINT(_rt_thread_entry)
LOAD ra, (sp) /* thread exit */
addi sp, sp, REGBYTES
LOAD ra, REGBYTES(sp) /* thread exit */
addi sp, sp, 2 * REGBYTES
LOAD a0, (sp) /* parameter */
addi sp, sp, REGBYTES
LOAD t0, (sp) /* tentry */
addi sp, sp, REGBYTES
LOAD t0, REGBYTES(sp) /* tentry */
addi sp, sp, 2 * REGBYTES
mv s1, ra
jalr t0
jalr s1

14
libcpu/risc-v/virt64/encoding.h
View File

@ -11,6 +11,15 @@
#ifndef RISCV_CSR_ENCODING_H
#define RISCV_CSR_ENCODING_H
#include <rtconfig.h>
#ifdef ARCH_RISCV_VECTOR
#include "vector_encoding.h"
#else
#define SSTATUS_VS 0 /* fallback */
#endif /* ARCH_RISCV_VECTOR */
#define MSTATUS_UIE 0x00000001
#define MSTATUS_SIE 0x00000002
#define MSTATUS_HIE 0x00000004
@ -23,7 +32,6 @@
#define MSTATUS_HPP 0x00000600
#define MSTATUS_MPP 0x00001800
#define MSTATUS_FS 0x00006000
#define MSTATUS_VS 0x00000600
#define MSTATUS_XS 0x00018000
#define MSTATUS_MPRV 0x00020000
#define MSTATUS_PUM 0x00040000
@ -41,10 +49,6 @@
#define SSTATUS_FS_INITIAL 0x00002000
#define SSTATUS_FS_CLEAN 0x00004000
#define SSTATUS_FS_DIRTY 0x00006000
#define SSTATUS_VS 0x00000600 /* Vector Status */
#define SSTATUS_VS_INITIAL 0x00000200
#define SSTATUS_VS_CLEAN 0x00000400
#define SSTATUS_VS_DIRTY 0x00000600
#define SSTATUS_XS 0x00018000
#define SSTATUS_SUM 0x00040000
#define SSTATUS32_SD 0x80000000

120
libcpu/risc-v/virt64/ext_context.h
View File

@ -5,29 +5,29 @@
*
* Change Logs:
* Date Author Notes
* 2022-10-10 RT-Thread the first version,
* compatible to riscv-v-spec-1.0
* 2022-10-10 RT-Thread the first version
*/
#ifndef __EXT_CONTEXT_H__
#define __EXT_CONTEXT_H__
#include <rtconfig.h>
#ifdef ARCH_RISCV_FPU
/* 32 fpu register */
#define CTX_FPU_REG_NR 32
#else
#define CTX_FPU_REG_NR 0
#endif /* ARCH_RISCV_FPU */
#ifdef __ASSEMBLY__
/**
* extension context maintenance
*/
#include "cpuport.h"
#include "encoding.h"
#include "vector_encoding.h"
/**
* ==================================
* FPU EXTENSION
* RISC-V D ISA (Floating)
* ==================================
*/
#ifdef ENABLE_FPU
#ifdef ARCH_RISCV_FPU
#define FPU_CTX_F0_OFF (REGBYTES * 0) /* offsetof(fpu_context_t, fpustatus.f[0]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F1_OFF (REGBYTES * 1) /* offsetof(fpu_context_t, fpustatus.f[1]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F2_OFF (REGBYTES * 2) /* offsetof(fpu_context_t, fpustatus.f[2]) - offsetof(fpu_context_t, fpustatus.f[0]) */
@ -60,96 +60,14 @@
#define FPU_CTX_F29_OFF (REGBYTES * 29) /* offsetof(fpu_context_t, fpustatus.f[29]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F30_OFF (REGBYTES * 30) /* offsetof(fpu_context_t, fpustatus.f[30]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#define FPU_CTX_F31_OFF (REGBYTES * 31) /* offsetof(fpu_context_t, fpustatus.f[31]) - offsetof(fpu_context_t, fpustatus.f[0]) */
#endif /* ENABLE_FPU */
/**
* ==================================
* VECTOR EXTENSION
* ==================================
*/
#ifdef ENABLE_VECTOR
#define VEC_FRAME_VSTART (0 * REGBYTES)
#define VEC_FRAME_VTYPE (1 * REGBYTES)
#define VEC_FRAME_VL (2 * REGBYTES)
#define VEC_FRAME_VCSR (3 * REGBYTES)
#define VEC_FRAME_V0 (4 * REGBYTES)
.macro GET_VEC_FRAME_LEN, xreg
csrr \xreg, vlenb
slli \xreg, \xreg, 5
addi \xreg, \xreg, 4 * REGBYTES
.endm
/**
* @brief save vector extension hardware state
*
* @param dst register storing bottom of storage block
*
*/
.macro SAVE_VECTOR, dst
mv t1, \dst
csrr t0, vstart
STORE t0, VEC_FRAME_VSTART(t1)
csrr t0, vtype
STORE t0, VEC_FRAME_VTYPE(t1)
csrr t0, vl
STORE t0, VEC_FRAME_VL(t1)
csrr t0, vcsr
STORE t0, VEC_FRAME_VCSR(t1)
addi t1, t1, VEC_FRAME_V0
// config vector setting,
// t2 is updated to length of a vector group in bytes
VEC_CONFIG_SETVLI(t2, x0, VEC_IMM_SEW_8, VEC_IMM_LMUL_8)
vse8.v v0, (t1)
add t1, t1, t2
vse8.v v8, (t1)
add t1, t1, t2
vse8.v v16, (t1)
add t1, t1, t2
vse8.v v24, (t1)
.endm
/**
* @brief restore vector extension hardware states
*
* @param dst register storing bottom of storage block
*
*/
.macro RESTORE_VECTOR, dst
// restore vector registers first since it will modify vector states
mv t0, \dst
addi t1, t0, VEC_FRAME_V0
VEC_CONFIG_SETVLI(t2, x0, VEC_IMM_SEW_8, VEC_IMM_LMUL_8)
vle8.v v0, (t1)
add t1, t1, t2
vle8.v v8, (t1)
add t1, t1, t2
vle8.v v16, (t1)
add t1, t1, t2
vle8.v v24, (t1)
mv t1, t0
LOAD t0, VEC_FRAME_VSTART(t1)
csrw vstart, t0
LOAD t0, VEC_FRAME_VCSR(t1)
csrw vcsr, t0
LOAD t0, VEC_FRAME_VTYPE(t1)
LOAD t3, VEC_FRAME_VL(t1)
VEC_CONFIG_SET_VL_VTYPE(t3, t0)
.endm
#endif /* ENABLE_VECTOR */
#endif /* ARCH_RISCV_FPU */
#endif /* __ASSEMBLY__ */
#ifdef ARCH_RISCV_VECTOR
#include "rvv_context.h"
#else /* !ARCH_RISCV_VECTOR */
#define CTX_VECTOR_REG_NR 0
#endif /* ARCH_RISCV_VECTOR */
#endif /* __EXT_CONTEXT_H__ */

5
libcpu/risc-v/virt64/interrupt_gcc.S
View File

@ -9,7 +9,7 @@
* 2018/12/27 Jesven Add SMP schedule
* 2021/02/02 lizhirui Add userspace support
* 2021/12/24 JasonHu Add user setting save/restore
* 2022/10/22 WangXiaoyao Support kernel mode RVV;
* 2022/10/22 Shell Support kernel mode RVV;
* Rewrite trap handling routine
*/
@ -69,6 +69,9 @@ _context_switch:
LOAD a0, 0(t0)
la t0, rt_interrupt_to_thread
LOAD a1, 0(t0)
csrr t0, sstatus
andi t0, t0, ~SSTATUS_SPIE
csrw sstatus, t0
jal rt_hw_context_switch
_resume_execution:

111
libcpu/risc-v/virt64/rvv_context.h Normal file
View File

@ -0,0 +1,111 @@
/*
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-10-10 RT-Thread the first version,
* compatible to riscv-v-spec-1.0
*/
#ifndef __RVV_CONTEXT_H__
#define __RVV_CONTEXT_H__
#include "cpuport.h"
#include "encoding.h"
#if defined(ARCH_VECTOR_VLEN_128)
#define CTX_VECTOR_REGS 64
#elif defined(ARCH_VECTOR_VLEN_256)
#define CTX_VECTOR_REGS 128
#else
#error "No supported VLEN"
#endif /* VLEN */
#define CTX_VECTOR_REG_NR (CTX_VECTOR_REGS + 4)
/**
* ==================================
* VECTOR EXTENSION
* ==================================
*/
#define VEC_FRAME_VSTART (0 * REGBYTES)
#define VEC_FRAME_VTYPE (1 * REGBYTES)
#define VEC_FRAME_VL (2 * REGBYTES)
#define VEC_FRAME_VCSR (3 * REGBYTES)
#define VEC_FRAME_V0 (4 * REGBYTES)
.macro GET_VEC_FRAME_LEN, xreg
csrr \xreg, vlenb
slli \xreg, \xreg, 5
addi \xreg, \xreg, 4 * REGBYTES
.endm
/**
* @brief save vector extension hardware state
*
* @param dst register storing bottom of storage block
*
*/
.macro SAVE_VECTOR, dst
mv t1, \dst
csrr t0, vstart
STORE t0, VEC_FRAME_VSTART(t1)
csrr t0, vtype
STORE t0, VEC_FRAME_VTYPE(t1)
csrr t0, vl
STORE t0, VEC_FRAME_VL(t1)
csrr t0, vcsr
STORE t0, VEC_FRAME_VCSR(t1)
addi t1, t1, VEC_FRAME_V0
// config vector setting,
// t2 is updated to length of a vector group in bytes
VEC_CONFIG_SETVLI(t2, x0, VEC_IMM_SEW_8, VEC_IMM_LMUL_8)
vse8.v v0, (t1)
add t1, t1, t2
vse8.v v8, (t1)
add t1, t1, t2
vse8.v v16, (t1)
add t1, t1, t2
vse8.v v24, (t1)
.endm
/**
* @brief restore vector extension hardware states
*
* @param dst register storing bottom of storage block
*
*/
.macro RESTORE_VECTOR, dst
// restore vector registers first since it will modify vector states
mv t0, \dst
addi t1, t0, VEC_FRAME_V0
VEC_CONFIG_SETVLI(t2, x0, VEC_IMM_SEW_8, VEC_IMM_LMUL_8)
vle8.v v0, (t1)
add t1, t1, t2
vle8.v v8, (t1)
add t1, t1, t2
vle8.v v16, (t1)
add t1, t1, t2
vle8.v v24, (t1)
mv t1, t0
LOAD t0, VEC_FRAME_VSTART(t1)
csrw vstart, t0
LOAD t0, VEC_FRAME_VCSR(t1)
csrw vcsr, t0
LOAD t0, VEC_FRAME_VTYPE(t1)
LOAD t3, VEC_FRAME_VL(t1)
VEC_CONFIG_SET_VL_VTYPE(t3, t0)
.endm
#endif /* __RVV_CONTEXT_H__ */

19
libcpu/risc-v/virt64/stack.h
View File

@ -6,12 +6,23 @@
* Change Logs:
* Date Author Notes
* 2021-01-30 lizhirui first version
* 2021-11-18 JasonHu add fpu member
* 2022-10-22 Shell Support kernel mode RVV
*/
#ifndef __STACK_H__
#define __STACK_H__
#include "stackframe.h"
#include <rtthread.h>
typedef struct rt_hw_switch_frame
{
uint64_t regs[RT_HW_SWITCH_CONTEXT_SIZE];
} *rt_hw_switch_frame_t;
struct rt_hw_stack_frame
{
rt_ubase_t epc; /* epc - epc - program counter */
@ -48,12 +59,12 @@ struct rt_hw_stack_frame
rt_ubase_t t6; /* x31 - t6 - temporary register 6 */
rt_ubase_t user_sp_exc_stack; /* sscratch - user mode sp/exception stack */
rt_ubase_t __padding; /* align to 16bytes */
#ifdef ENABLE_FPU
#ifdef ARCH_RISCV_FPU
rt_ubase_t f[CTX_FPU_REG_NR]; /* f0~f31 */
#endif
#ifdef ENABLE_VECTOR
#endif /* ARCH_RISCV_FPU */
#ifdef ARCH_RISCV_VECTOR
rt_ubase_t v[CTX_VECTOR_REG_NR];
#endif
#endif /* ARCH_RISCV_VECTOR */
};
#endif

65
libcpu/risc-v/virt64/stackframe.h
View File

@ -8,33 +8,70 @@
* 2021-02-02 lizhirui first version
* 2021-02-11 lizhirui fixed gp save/store bug
* 2021-11-18 JasonHu add fpu registers save/restore
* 2022/10/22 WangXiaoyao Support kernel mode RVV;
* 2022-10-22 Shell Support kernel mode RVV
*/
#ifndef __STACKFRAME_H__
#define __STACKFRAME_H__
#include "cpuport.h"
#include <rtconfig.h>
#include "encoding.h"
#include "ext_context.h"
/* bytes of register width */
#ifdef ARCH_CPU_64BIT
#define STORE sd
#define LOAD ld
#define FSTORE fsd
#define FLOAD fld
#define REGBYTES 8
#else
// error here, not portable
#error "Not supported XLEN"
#endif
/* 33 general register + 1 padding */
#define CTX_GENERAL_REG_NR 34
/* all context registers */
#define CTX_REG_NR (CTX_GENERAL_REG_NR + CTX_FPU_REG_NR + CTX_VECTOR_REG_NR)
#define BYTES(idx) ((idx) * REGBYTES)
#define FRAME_OFF_SSTATUS BYTES(2)
#define FRAME_OFF_SP BYTES(32)
#define FRAME_OFF_GP BYTES(3)
/* switch frame */
#define RT_HW_SWITCH_CONTEXT_SSTATUS 0
#define RT_HW_SWITCH_CONTEXT_S11 1
#define RT_HW_SWITCH_CONTEXT_S10 2
#define RT_HW_SWITCH_CONTEXT_S9 3
#define RT_HW_SWITCH_CONTEXT_S8 4
#define RT_HW_SWITCH_CONTEXT_S7 5
#define RT_HW_SWITCH_CONTEXT_S6 6
#define RT_HW_SWITCH_CONTEXT_S5 7
#define RT_HW_SWITCH_CONTEXT_S4 8
#define RT_HW_SWITCH_CONTEXT_S3 9
#define RT_HW_SWITCH_CONTEXT_S2 10
#define RT_HW_SWITCH_CONTEXT_S1 11
#define RT_HW_SWITCH_CONTEXT_S0 12
#define RT_HW_SWITCH_CONTEXT_RA 13
#define RT_HW_SWITCH_CONTEXT_TP 14
#define RT_HW_SWITCH_CONTEXT_ALIGNMENT 15 // Padding for alignment
#define RT_HW_SWITCH_CONTEXT_SIZE 16 // Total size of the structure
#ifdef __ASSEMBLY__
.macro SAVE_ALL
#ifdef ENABLE_FPU
#ifdef ARCH_RISCV_FPU
/* reserve float registers */
addi sp, sp, -CTX_FPU_REG_NR * REGBYTES
#endif /* ENABLE_FPU */
#ifdef ENABLE_VECTOR
#endif /* ARCH_RISCV_FPU */
#ifdef ARCH_RISCV_VECTOR
/* reserve float registers */
addi sp, sp, -CTX_VECTOR_REG_NR * REGBYTES
#endif /* ENABLE_VECTOR */
#endif /* ARCH_RISCV_VECTOR */
/* save general registers */
addi sp, sp, -CTX_GENERAL_REG_NR * REGBYTES
@ -78,7 +115,7 @@
csrr t0, sscratch
STORE t0, 32 * REGBYTES(sp)
#ifdef ENABLE_FPU
#ifdef ARCH_RISCV_FPU
/* backup sp and adjust sp to save float registers */
mv t1, sp
addi t1, t1, CTX_GENERAL_REG_NR * REGBYTES
@ -125,9 +162,9 @@
li t0, SSTATUS_FS_CLEAN
csrs sstatus, t0
#endif /* ENABLE_FPU */
#endif /* ARCH_RISCV_FPU */
#ifdef ENABLE_VECTOR
#ifdef ARCH_RISCV_VECTOR
csrr t0, sstatus
andi t0, t0, SSTATUS_VS
beqz t0, 0f
@ -137,7 +174,7 @@
SAVE_VECTOR t1
0:
#endif /* ENABLE_VECTOR */
#endif /* ARCH_RISCV_VECTOR */
.endm
/**
@ -146,7 +183,7 @@
*/
.macro RESTORE_ALL
#ifdef ENABLE_VECTOR
#ifdef ARCH_RISCV_VECTOR
// skip on close
ld t0, 2 * REGBYTES(sp)
// cannot use vector on initial
@ -158,9 +195,9 @@
RESTORE_VECTOR t1
0:
#endif /* ENABLE_VECTOR */
#endif /* ARCH_RISCV_VECTOR */
#ifdef ENABLE_FPU
#ifdef ARCH_RISCV_FPU
/* restore float register */
addi t2, sp, CTX_GENERAL_REG_NR * REGBYTES
@ -206,7 +243,7 @@
li t0, SSTATUS_FS_CLEAN
csrs sstatus, t0
#endif /* ENABLE_FPU */
#endif /* ARCH_RISCV_FPU */
/* restore general register */
addi t0, sp, CTX_REG_NR * REGBYTES

7
libcpu/risc-v/virt64/vector_encoding.h
View File

@ -12,6 +12,13 @@
#ifndef __VECTOR_ENCODING_H__
#define __VECTOR_ENCODING_H__
/* mstatus/sstatus */
#define MSTATUS_VS 0x00000600
#define SSTATUS_VS 0x00000600 /* Vector Status */
#define SSTATUS_VS_INITIAL 0x00000200
#define SSTATUS_VS_CLEAN 0x00000400
#define SSTATUS_VS_DIRTY 0x00000600
/**
* assembler names used for vset{i}vli vtypei immediate
*/

45
libcpu/risc-v/virt64/vector_gcc.S Normal file
View File

@ -0,0 +1,45 @@
/*
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018/10/28 Bernard The unify RISC-V porting implementation
* 2018/12/27 Jesven Add SMP support
* 2021/02/02 lizhirui Add userspace support
* 2022/10/22 Shell Support User mode RVV;
* Trimming process switch context
* 2024/09/01 Shell Separated vector ctx from the generic
*/
#include "cpuport.h"
#include "stackframe.h"
/**
* @param a0 pointer to frame bottom
*/
.global rt_hw_vector_ctx_save
rt_hw_vector_ctx_save:
SAVE_VECTOR a0
ret
/**
* @param a0 pointer to frame bottom
*/
.global rt_hw_vector_ctx_restore
rt_hw_vector_ctx_restore:
RESTORE_VECTOR a0
ret
.global rt_hw_disable_vector
rt_hw_disable_vector:
li t0, SSTATUS_VS
csrc sstatus, t0
ret
.global rt_hw_enable_vector
rt_hw_enable_vector:
li t0, SSTATUS_VS
csrs sstatus, t0
ret