diff options
Diffstat (limited to 'kernel/kernel.c')
| -rw-r--r-- | kernel/kernel.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/kernel/kernel.c b/kernel/kernel.c index 5844f49..ebb3841 100644 --- a/kernel/kernel.c +++ b/kernel/kernel.c @@ -50,7 +50,6 @@ void show_error(uint32_t err) void int_irq13() { X86_IRQ_BEGIN - uint32_t err; asm("pop %eax"); // get Error Code @@ -68,6 +67,17 @@ void int_irq16(){ X86_IRQ_BEGIN panic(FOOLOS_MODULE_NAME,"Coprocessor error"); void int_irq17(){ X86_IRQ_BEGIN panic(FOOLOS_MODULE_NAME,"Alignment Check"); X86_IRQ_END } void int_irq18(){ X86_IRQ_BEGIN panic(FOOLOS_MODULE_NAME,"Machine Check"); X86_IRQ_END } +void enable_a20() +{ +//; ;enable A20 +//; ;http://www.brokenthorn.com/Resources/OSDev9.html +//; ;Method 3.1: Enables A20 through keyboard controller +//; ;Not all keyboard controllers support this + asm("mov $0xdd, %al");// ; command 0xdd: enable a20 +//; ;mov al, 0xdf ; command 0xdf: disable a20 + asm("outb %al, $0x64");// ; send command to controller +} + // heart of our operating system. void kernel_main(uint32_t initial_stack) { @@ -96,6 +106,12 @@ void kernel_main(uint32_t initial_stack) // initial stack log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"initial esp: 0x%08X",initial_stack); + log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"enable A20"); + enable_a20(); + + log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"setup PIC"); + pic_setup(); + // PIT config (timer) timer_init(); |