diff options
Diffstat (limited to 'machine')
| -rw-r--r-- | machine/machine.mk.in | 4 | ||||
| -rw-r--r-- | machine/mcall.h | 7 | ||||
| -rw-r--r-- | machine/minit.c | 9 | ||||
| -rw-r--r-- | machine/mtrap.c | 8 | ||||
| -rw-r--r-- | machine/mtrap.h | 3 | ||||
| -rw-r--r-- | machine/sbi.S | 15 | ||||
| -rw-r--r-- | machine/sbi.h | 30 | ||||
| -rw-r--r-- | machine/sbi_entry.S | 111 | ||||
| -rw-r--r-- | machine/sbi_impl.c | 33 |
9 files changed, 7 insertions, 213 deletions
diff --git a/machine/machine.mk.in b/machine/machine.mk.in index e224982..d083fdf 100644 --- a/machine/machine.mk.in +++ b/machine/machine.mk.in @@ -11,7 +11,6 @@ machine_hdrs = \ htif.h \ mcall.h \ mtrap.h \ - sbi.h \ unprivileged_memory.h \ vm.h \ @@ -24,11 +23,8 @@ machine_c_srcs = \ fp_emulation.c \ fp_ldst.c \ misaligned_ldst.c \ - sbi_impl.c \ configstring.c \ machine_asm_srcs = \ mentry.S \ fp_asm.S \ - sbi_entry.S \ - sbi.S \ diff --git a/machine/mcall.h b/machine/mcall.h index ed5a28c..a704480 100644 --- a/machine/mcall.h +++ b/machine/mcall.h @@ -1,7 +1,6 @@ #ifndef _RISCV_MCALL_H #define _RISCV_MCALL_H -#define MCALL_HART_ID 0 #define MCALL_CONSOLE_PUTCHAR 1 #define MCALL_CONSOLE_GETCHAR 2 #define MCALL_SEND_IPI 4 @@ -11,10 +10,4 @@ #define MCALL_REMOTE_SFENCE_VM 8 #define MCALL_REMOTE_FENCE_I 9 -#ifndef __ASSEMBLER__ - -extern uintptr_t do_mcall(uintptr_t which, ...); - -#endif - #endif diff --git a/machine/minit.c b/machine/minit.c index 06e8d25..0c95ea4 100644 --- a/machine/minit.c +++ b/machine/minit.c @@ -141,7 +141,7 @@ void init_other_hart() boot_other_hart(); } -void enter_supervisor_mode(void (*fn)(uintptr_t), uintptr_t stack) +void enter_supervisor_mode(void (*fn)(uintptr_t), uintptr_t arg0, uintptr_t arg1) { uintptr_t mstatus = read_csr(mstatus); mstatus = INSERT_FIELD(mstatus, MSTATUS_MPP, PRV_S); @@ -149,7 +149,10 @@ void enter_supervisor_mode(void (*fn)(uintptr_t), uintptr_t stack) write_csr(mstatus, mstatus); write_csr(mscratch, MACHINE_STACK_TOP() - MENTRY_FRAME_SIZE); write_csr(mepc, fn); - write_csr(sptbr, ((uintptr_t)root_page_table >> RISCV_PGSHIFT) | SPTBR_MODE); - asm volatile ("mv a0, %0; mv sp, %0; mret" : : "r" (stack)); + write_csr(sptbr, 0); + + register uintptr_t a0 asm ("a0") = arg0; + register uintptr_t a1 asm ("a1") = arg1; + asm volatile ("mret" : : "r" (a0), "r" (a1)); __builtin_unreachable(); } diff --git a/machine/mtrap.c b/machine/mtrap.c index 0ed27e9..3cbc064 100644 --- a/machine/mtrap.c +++ b/machine/mtrap.c @@ -13,11 +13,6 @@ void __attribute__((noreturn)) bad_trap() die("machine mode: unhandlable trap %d @ %p", read_csr(mcause), read_csr(mepc)); } -static uintptr_t mcall_hart_id() -{ - return read_const_csr(mhartid); -} - uintptr_t timer_interrupt() { // just send the timer interrupt to the supervisor @@ -156,9 +151,6 @@ void mcall_trap(uintptr_t* regs, uintptr_t mcause, uintptr_t mepc) uintptr_t n = regs[17], arg0 = regs[10], arg1 = regs[11], retval; switch (n) { - case MCALL_HART_ID: - retval = mcall_hart_id(); - break; case MCALL_CONSOLE_PUTCHAR: retval = mcall_console_putchar(arg0); break; diff --git a/machine/mtrap.h b/machine/mtrap.h index 68c93f2..1f692b3 100644 --- a/machine/mtrap.h +++ b/machine/mtrap.h @@ -11,7 +11,6 @@ #ifndef __ASSEMBLER__ -#include "sbi.h" #include <stdint.h> #include <stddef.h> @@ -68,7 +67,7 @@ void putstring(const char* s); #define assert(x) ({ if (!(x)) die("assertion failed: %s", #x); }) #define die(str, ...) ({ printm("%s:%d: " str "\n", __FILE__, __LINE__, ##__VA_ARGS__); poweroff(); }) -void enter_supervisor_mode(void (*fn)(uintptr_t), uintptr_t stack) +void enter_supervisor_mode(void (*fn)(uintptr_t), uintptr_t arg0, uintptr_t arg1) __attribute__((noreturn)); void boot_loader(); void boot_other_hart(); diff --git a/machine/sbi.S b/machine/sbi.S deleted file mode 100644 index cbea78a..0000000 --- a/machine/sbi.S +++ /dev/null @@ -1,15 +0,0 @@ -.globl sbi_hart_id; sbi_hart_id = -2048 -.globl sbi_num_harts; sbi_num_harts = -2032 -.globl sbi_query_memory; sbi_query_memory = -2016 -.globl sbi_console_putchar; sbi_console_putchar = -2000 -.globl sbi_console_getchar; sbi_console_getchar = -1984 -.globl sbi_send_ipi; sbi_send_ipi = -1952 -.globl sbi_clear_ipi; sbi_clear_ipi = -1936 -.globl sbi_timebase; sbi_timebase = -1920 -.globl sbi_shutdown; sbi_shutdown = -1904 -.globl sbi_set_timer; sbi_set_timer = -1888 -.globl sbi_mask_interrupt; sbi_mask_interrupt = -1872 -.globl sbi_unmask_interrupt; sbi_unmask_interrupt = -1856 -.globl sbi_remote_sfence_vm; sbi_remote_sfence_vm = -1840 -.globl sbi_remote_sfence_vm_range; sbi_remote_sfence_vm_range = -1824 -.globl sbi_remote_fence_i; sbi_remote_fence_i = -1808 diff --git a/machine/sbi.h b/machine/sbi.h deleted file mode 100644 index 4e2fbd8..0000000 --- a/machine/sbi.h +++ /dev/null @@ -1,30 +0,0 @@ -#ifndef _ASM_RISCV_SBI_H -#define _ASM_RISCV_SBI_H - -typedef struct { - unsigned long base; - unsigned long size; - unsigned long node_id; -} memory_block_info; - -unsigned long sbi_query_memory(unsigned long id, memory_block_info *p); - -unsigned long sbi_hart_id(void); -unsigned long sbi_num_harts(void); -unsigned long sbi_timebase(void); -void sbi_set_timer(unsigned long long stime_value); -void sbi_send_ipi(unsigned long hart_id); -unsigned long sbi_clear_ipi(void); -void sbi_shutdown(void); - -void sbi_console_putchar(unsigned char ch); -int sbi_console_getchar(void); - -void sbi_remote_sfence_vm(unsigned long hart_mask_ptr, unsigned long asid); -void sbi_remote_sfence_vm_range(unsigned long hart_mask_ptr, unsigned long asid, unsigned long start, unsigned long size); -void sbi_remote_fence_i(unsigned long hart_mask_ptr); - -unsigned long sbi_mask_interrupt(unsigned long which); -unsigned long sbi_unmask_interrupt(unsigned long which); - -#endif diff --git a/machine/sbi_entry.S b/machine/sbi_entry.S deleted file mode 100644 index a37dd25..0000000 --- a/machine/sbi_entry.S +++ /dev/null @@ -1,111 +0,0 @@ -#include "encoding.h" -#include "mcall.h" - - .section .sbi,"ax",@progbits - .option norvc - .align RISCV_PGSHIFT - .globl sbi_base -sbi_base: - - # TODO: figure out something better to do with this space. It's not - # protected from the OS, so beware. - .skip RISCV_PGSIZE - 2048 - - # hart_id - .align 4 - li a7, MCALL_HART_ID - ecall - ret - - # num_harts - .align 4 - lw a0, num_harts - ret - - # query_memory - .align 4 - tail __sbi_query_memory - - # console_putchar - .align 4 - li a7, MCALL_CONSOLE_PUTCHAR - ecall - ret - - # console_getchar - .align 4 - li a7, MCALL_CONSOLE_GETCHAR - ecall - ret - - # empty - .align 4 - unimp - - # send ipi - .align 4 - li a7, MCALL_SEND_IPI - ecall - ret - - # clear ipi - .align 4 - li a7, MCALL_CLEAR_IPI - ecall - ret - - # timebase - .align 4 - li a0, 10000000 # or, you know, we could provide the correct answer - ret - - # shutdown - .align 4 - li a7, MCALL_SHUTDOWN - ecall - - # set_timer - .align 4 - li a7, MCALL_SET_TIMER - ecall - ret - - # mask_interrupt - .align 4 - tail __sbi_mask_interrupt - - # unmask_interrupt - .align 4 - tail __sbi_unmask_interrupt - - # remote_sfence_vm - .align 4 - li a7, MCALL_REMOTE_SFENCE_VM - ecall - ret - - # remote_sfence_vm_range - .align 4 - li a7, MCALL_REMOTE_SFENCE_VM - ecall - ret - - # remote_fence_i - .align 4 - li a7, MCALL_REMOTE_FENCE_I - ecall - ret - - # end of SBI trampolines - - .globl do_mcall -do_mcall: - mv a7, a0 - mv a0, a1 - mv a1, a2 - ecall - ret - - .align RISCV_PGSHIFT - .globl _sbi_end -_sbi_end: diff --git a/machine/sbi_impl.c b/machine/sbi_impl.c deleted file mode 100644 index f5ed8c9..0000000 --- a/machine/sbi_impl.c +++ /dev/null @@ -1,33 +0,0 @@ -#include "mtrap.h" -#include "sbi.h" - -uintptr_t __sbi_query_memory(uintptr_t id, memory_block_info *p) -{ - if (id == 0) { - p->base = first_free_paddr; - p->size = mem_size + DRAM_BASE - p->base; - return 0; - } - - return -1; -} - -#define LOW_IRQ_OK(n) ((n) == IRQ_S_SOFT || (n) == IRQ_S_TIMER) - -uintptr_t __sbi_mask_interrupt(uintptr_t which) -{ - if (!LOW_IRQ_OK(which)) - return -1; - - clear_csr(sie, 1UL << which); - return 0; -} - -uintptr_t __sbi_unmask_interrupt(uintptr_t which) -{ - if (!LOW_IRQ_OK(which)) - return -1; - - set_csr(sie, 1UL << which); - return 0; -} |