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sse support

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Matheus
2022-08-20 11:58:05 -03:00
parent 1ed7aafa46
commit fce640c0f9
3 changed files with 16 additions and 1 deletions
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src/arch/x86_64/cpu.c
+11
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@@ -37,4 +37,15 @@ void cpu_state_init(){
// undefined opcode exception will handle system calls then // undefined opcode exception will handle system calls then
else printf("CPU%lu: syscall instruction not supported\n", arch_getcls()->lapicid); else printf("CPU%lu: syscall instruction not supported\n", arch_getcls()->lapicid);
// enable SSE
asm volatile(
"mov %%cr0, %%rax;"
"and $0xFFFB, %%ax;"
"or $2, %%eax;"
"mov %%rax, %%cr0;"
"mov %%cr4, %%rax;"
"or $0b11000000000, %%rax;"
"mov %%rax, %%cr4;"
: : : "rax");
} }
src/arch/x86_64/include/arch/regs.h
+1
View File
@@ -6,6 +6,7 @@
typedef struct{ typedef struct{
uint64_t gsbase, fsbase; uint64_t gsbase, fsbase;
uint8_t fx[512];
} arch_extraregs; } arch_extraregs;
typedef struct{ typedef struct{
src/arch/x86_64/regs.c
+4 -1
View File
@@ -4,13 +4,16 @@
void arch_regs_saveextra(arch_extraregs* regs){ void arch_regs_saveextra(arch_extraregs* regs){
// user gs was swapped // user gs was swapped
regs->gsbase = rdmsr(MSR_KERNELGSBASE); regs->gsbase = rdmsr(MSR_KERNELGSBASE);
regs->fsbase = rdmsr(MSR_FSBASE); regs->fsbase = rdmsr(MSR_FSBASE);
asm("fxsave (%%rax)" : : "a"(&regs->fx[0]));
} }
void arch_regs_setupextra(arch_extraregs* regs){ void arch_regs_setupextra(arch_extraregs* regs){
// gs will be swapped later // gs will be swapped later
wrmsr(MSR_KERNELGSBASE, regs->gsbase); wrmsr(MSR_KERNELGSBASE, regs->gsbase);
wrmsr(MSR_FSBASE, regs->fsbase); wrmsr(MSR_FSBASE, regs->fsbase);
asm("fxrstor (%%rax)" : : "a"(&regs->fx[0]));
} }
void arch_regs_setupkernel(arch_regs* regs, void* ip, void* stack, bool interrupts){ void arch_regs_setupkernel(arch_regs* regs, void* ip, void* stack, bool interrupts){