banan-os/kernel/arch/i686/interrupts.S

189 lines
2.1 KiB
ArmAsm

.macro push_userspace
pushw %gs
pushw %fs
pushw %es
pushw %ds
pushal
.endm
.macro load_kernel_segments
movw $0x10, %ax
movw %ax, %ds
movw %ax, %es
movw %ax, %fs
movw $0x28, %ax
movw %ax, %gs
.endm
.macro pop_userspace
popal
popw %ds
popw %es
popw %fs
popw %gs
.endm
isr_stub:
push_userspace
load_kernel_segments
movl %cr0, %eax; pushl %eax
movl %cr2, %eax; pushl %eax
movl %cr3, %eax; pushl %eax
movl %cr4, %eax; pushl %eax
movl %esp, %eax // register ptr
leal 64(%esp), %ebx // interrupt stack ptr
movl 60(%esp), %ecx // error code
movl 56(%esp), %edx // isr number
movl %esp, %ebp
subl $15, %esp
andl $0xFFFFFFF0, %esp
pushl %eax
pushl %ebx
pushl %ecx
pushl %edx
call cpp_isr_handler
movl %ebp, %esp
addl $16, %esp
pop_userspace
addl $8, %esp
iret
irq_stub:
push_userspace
load_kernel_segments
movl 40(%esp), %eax # interrupt number
movl %esp, %ebp
subl $15, %esp
andl $0xFFFFFFF0, %esp
subl $12, %esp
pushl %eax
call cpp_irq_handler
movl %ebp, %esp
pop_userspace
addl $8, %esp
iret
.global asm_yield_handler
asm_yield_handler:
# This can only be called from kernel, so no segment saving is needed
pushal
movl %esp, %eax # interrupt registers ptr
leal 32(%esp), %ebx # interrupt stack ptr
movl %esp, %ebp
subl $15, %esp
andl $0xFFFFFFF0, %esp
subl $8, %esp
pushl %eax
pushl %ebx
call cpp_yield_handler
movl %ebp, %esp
popal
iret
.macro isr n
.global isr\n
isr\n:
pushl $0
pushl $\n
jmp isr_stub
.endm
.macro isr_err n
.global isr\n
isr\n:
pushl $\n
jmp isr_stub
.endm
.macro irq n
.global irq\n
irq\n:
pushl $0
pushl $\n
jmp irq_stub
.endm
isr 0
isr 1
isr 2
isr 3
isr 4
isr 5
isr 6
isr 7
isr_err 8
isr 9
isr_err 10
isr_err 11
isr_err 12
isr_err 13
isr_err 14
isr 15
isr 16
isr_err 17
isr 18
isr 19
isr 20
isr 21
isr 22
isr 23
isr 24
isr 25
isr 26
isr 27
isr 28
isr 29
isr 30
isr 31
irq 0
irq 1
irq 2
irq 3
irq 4
irq 5
irq 6
irq 7
irq 8
irq 9
irq 10
irq 11
irq 12
irq 13
irq 14
irq 15
irq 16
irq 17
irq 18
irq 19
irq 20
irq 21
irq 22
irq 23
irq 24
irq 25
irq 26
irq 27
irq 28
irq 29
irq 30
irq 31
irq 32