174 lines
1.9 KiB
ArmAsm
174 lines
1.9 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
|
|
|
|
subl $12, %esp
|
|
pushl %eax
|
|
pushl %ebx
|
|
pushl %ecx
|
|
pushl %edx
|
|
call cpp_isr_handler
|
|
addl $44, %esp
|
|
|
|
pop_userspace
|
|
addl $8, %esp
|
|
iret
|
|
|
|
irq_stub:
|
|
push_userspace
|
|
load_kernel_segments
|
|
|
|
movl 40(%esp), %eax # interrupt number
|
|
|
|
subl $12, %esp
|
|
pushl %eax
|
|
call cpp_irq_handler
|
|
addl $16, %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
|
|
|
|
subl $4, %esp
|
|
pushl %eax
|
|
pushl %ebx
|
|
call cpp_yield_handler
|
|
addl $12, %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
|