Skip to content

setup: add option to enable FPU via cmdline #218

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
82marbag merged 1 commit into from
Oct 13, 2021
Merged

setup: add option to enable FPU via cmdline #218

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
8 changes: 8 additions & 0 deletions common/setup.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -74,6 +74,9 @@ bool_cmd("apic_timer", opt_apic_timer);
bool opt_hpet = false;
bool_cmd("hpet", opt_hpet);

bool opt_fpu = false;
bool_cmd("fpu", opt_fpu);

io_port_t __data_rmode com_ports[2] = {COM1_PORT, COM2_PORT};

boot_flags_t boot_flags;
Expand Down Expand Up @@ -303,6 +306,11 @@ void __noreturn __text_init kernel_start(uint32_t multiboot_magic,
if (opt_keyboard)
init_keyboard(get_bsp_cpu_id());

if (opt_fpu) {
printk("Enabling FPU instructions support\n");
enable_fpu();
}

#ifdef KTF_PMU
printk("Initializing PFM library\n");

Expand Down
2 changes: 1 addition & 1 deletion include/lib.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -421,7 +421,7 @@ static inline unsigned long ipow(int base, unsigned int exp) {
return result;
}

static inline void enable_sse(void) {
static inline void enable_fpu(void) {
write_cr0((read_cr0() & ~X86_CR0_EM) | X86_CR0_MP);
write_cr4(read_cr4() | X86_CR4_OSFXSR | X86_CR4_OSXMMEXCPT);
}
Expand Down