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Added mock SBI_EXTENSION_TIMER

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This commit is contained in:
Valentin Haudiquet
2023-10-20 11:28:12 +02:00
parent bdc091aab2
commit 082d2dcd4f
2 changed files with 31 additions and 0 deletions
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26
src/devices/sbi/sbi.c
View File

@@ -16,6 +16,19 @@ void sbi_call(rv32_cpu_t* cpu, uint32_t extension_id, uint32_t func_id)
cpu->regs.a0 = 0;
cpu->regs.a1 = 0x2000000;
break;
case SBI_FUNCTION_GET_IMPL_ID:
cpu->regs.a0 = 0;
cpu->regs.a1 = 0;
break;
case SBI_FUNCTION_GET_IMPL_VERSION:
cpu->regs.a0 = 0;
cpu->regs.a1 = 0;
break;
case SBI_FUNCTION_PROBE_EXTENSION:
// For now, we say that everything is available
cpu->regs.a0 = 0;
cpu->regs.a1 = 1;
break;
case SBI_FUNCTION_GET_MVENDOR_ID:
cpu->regs.a0 = 0;
cpu->regs.a1 = 0;
@@ -34,6 +47,19 @@ void sbi_call(rv32_cpu_t* cpu, uint32_t extension_id, uint32_t func_id)
}
break;
}
case SBI_EXTENSION_TIMER:
{
switch(func_id)
{
case SBI_FUNCTION_SET_TIMER:
cpu->regs.a0 = 0;
cpu->regs.a1 = 0;
break;
default:
fprintf(stderr, "sbi_call: unknown function id 0x%x for timer extension\n", func_id);
break;
}
}
case SBI_EXTENSION_SET_TIMER:
{
// TODO : Correctly implement that

5
src/devices/sbi/sbi.h
View File

@@ -13,6 +13,11 @@
#define SBI_FUNCTION_GET_MARCH_ID 0x5
#define SBI_FUNCTION_GET_MIMPL_ID 0x6
/* SBI Timer extension */
#define SBI_EXTENSION_TIMER 0x54494d45
#define SBI_FUNCTION_SET_TIMER 0x0
/* SBI legacy */
#define SBI_EXTENSION_SET_TIMER 0x0
#define SBI_EXTENSION_LEGACY_CONSOLE_PUTCHAR 0x1
#define SBI_EXTENSION_LEGACY_SHUTDOWN 0x8