| 30,16 → 30,9 |
|---|
| |
| .text |
| |
| .global cpu_priority_high |
| .global cpu_priority_low |
| .global cpu_priority_restore |
| .global cpu_priority_read |
| .global cpu_halt |
| .global cpu_sleep |
| .global paging_on |
| .global cpu_read_dba |
| .global cpu_write_dba |
| .global cpu_read_cr2 |
| .global enable_l_apic_in_msr |
| .global interrupt_handlers |
| .global inb |
| 54,59 → 47,6 |
|---|
| .global memcmp |
| |
| |
| ## Set priority level high |
| # |
| # Disable interrupts and return previous |
| # EFLAGS in EAX. |
| # |
| cpu_priority_high: |
| pushf |
| pop %eax |
| cli |
| ret |
| |
| |
| ## Set priority level low |
| # |
| # Enable interrupts and return previous |
| # EFLAGS in EAX. |
| # |
| cpu_priority_low: |
| pushf |
| pop %eax |
| sti |
| ret |
| |
| |
| ## Restore priority level |
| # |
| # Restore EFLAGS. |
| # |
| cpu_priority_restore: |
| push 4(%esp) |
| popf |
| ret |
| |
| ## Return raw priority level |
| # |
| # Return EFLAFS in EAX. |
| # |
| cpu_priority_read: |
| pushf |
| pop %eax |
| ret |
| |
| |
| ## Halt the CPU |
| # |
| # Halt the CPU using HLT. |
| # |
| cpu_halt: |
| cpu_sleep: |
| hlt |
| ret |
| |
| |
| ## Turn paging on |
| # |
| # Enable paging and write-back caching in CR0. |
| 123,36 → 63,6 |
|---|
| ret |
| |
| |
| ## Read CR3 |
| # |
| # Store CR3 in EAX. |
| # |
| cpu_read_dba: |
| movl %cr3,%eax |
| ret |
| |
| |
| ## Write CR3 |
| # |
| # Set CR3. |
| # |
| cpu_write_dba: |
| pushl %eax |
| movl 8(%esp),%eax |
| movl %eax,%cr3 |
| popl %eax |
| ret |
| |
| |
| ## Read CR2 |
| # |
| # Store CR2 in EAX. |
| # |
| cpu_read_cr2: |
| movl %cr2,%eax |
| ret |
| |
| |
| ## Enable local APIC |
| # |
| # Enable local APIC in MSR. |