diff options
author | Jon Santmyer <jon@jonsantmyer.com> | 2024-05-22 13:00:41 -0400 |
---|---|---|
committer | Jon Santmyer <jon@jonsantmyer.com> | 2024-05-22 13:00:41 -0400 |
commit | ace65b453151845bc361f21f3e5b651c35f9f126 (patch) | |
tree | 262ebd29b0ca1d8584f0b6f1efa7a00d9f4f3e43 /arch/x86_64/cpu.c | |
parent | f004c1ade8d617a82cea2fe249434cccb47a2358 (diff) | |
download | jove-kernel-ace65b453151845bc361f21f3e5b651c35f9f126.tar.gz jove-kernel-ace65b453151845bc361f21f3e5b651c35f9f126.tar.bz2 jove-kernel-ace65b453151845bc361f21f3e5b651c35f9f126.zip |
Diffstat (limited to 'arch/x86_64/cpu.c')
-rw-r--r-- | arch/x86_64/cpu.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/x86_64/cpu.c b/arch/x86_64/cpu.c new file mode 100644 index 0000000..d088fcd --- /dev/null +++ b/arch/x86_64/cpu.c @@ -0,0 +1,35 @@ +#include "arch/cpu.h" +#include "arch/x86_64/msr.h" + +extern void _syscall_entry(void); + +extern void idt_init(); + +void +cpu_setup(void) +{ + idt_init(); + + cpu_arch_enable_sce(); + cpu_set_syscall_entry((void*)_syscall_entry); +} + +void cpu_arch_enable_sce(void) +{ + msr_efer_t feat = msr_efer_read(); + feat.sce = 1; + msr_efer_write(feat); + + msr_star_t star = msr_star_read(); + star.kcs = 0x08; + star.ucs = 0x18; + msr_star_write(star); +} + +void +cpu_set_syscall_entry(void *ptr) +{ + msr_lstar_t lstar = (msr_lstar_t)ptr; + msr_lstar_write(lstar); +} + |