| 28,9 → 28,9 |
|---|
| |
| ## very low and hardware-level functions |
| |
| # Mask for interrupts 0 - 31 (bits 0 - 31) where 0 means that int has no error word |
| # and 1 means interrupt with error word |
| #define ERROR_WORD_INTERRUPT_LIST 0x00027D00 |
| # Mask for interrupts 0 - 31 (bits 0 - 31) where 0 means that int has no error |
| # word and 1 means interrupt with error word |
| #define ERROR_WORD_INTERRUPT_LIST 0x00027d00 |
| |
| .text |
| |
| 65,27 → 65,27 |
|---|
| memcpy: |
| memcpy_from_uspace: |
| memcpy_to_uspace: |
| movl %edi, %edx /* save %edi */ |
| movl %esi, %eax /* save %esi */ |
| movl %edi, %edx /* save %edi */ |
| movl %esi, %eax /* save %esi */ |
| |
| movl MEMCPY_SIZE(%esp), %ecx |
| shrl $2, %ecx /* size / 4 */ |
| shrl $2, %ecx /* size / 4 */ |
| |
| movl MEMCPY_DST(%esp), %edi |
| movl MEMCPY_SRC(%esp), %esi |
| |
| rep movsl /* copy as much as possible word by word */ |
| rep movsl /* copy whole words */ |
| |
| movl MEMCPY_SIZE(%esp), %ecx |
| andl $3, %ecx /* size % 4 */ |
| andl $3, %ecx /* size % 4 */ |
| jz 0f |
| |
| rep movsb /* copy the rest byte by byte */ |
| rep movsb /* copy the rest byte by byte */ |
| |
| 0: |
| movl %edx, %edi |
| movl %eax, %esi |
| movl MEMCPY_SRC(%esp), %eax /* MEMCPY_SRC(%esp), success */ |
| movl MEMCPY_SRC(%esp), %eax /* MEMCPY_SRC(%esp), success */ |
| ret |
| |
| /* |
| 96,7 → 96,7 |
|---|
| memcpy_to_uspace_failover_address: |
| movl %edx, %edi |
| movl %eax, %esi |
| xorl %eax, %eax /* return 0, failure */ |
| xorl %eax, %eax /* return 0, failure */ |
| ret |
| |
| ## Turn paging on |
| 104,9 → 104,10 |
|---|
| # Enable paging and write-back caching in CR0. |
| # |
| paging_on: |
| movl %cr0,%edx |
| orl $(1<<31),%edx # paging on |
| andl $~((1<<30)|(1<<29)),%edx # clear Cache Disable and not Write Though |
| movl %cr0, %edx |
| orl $(1 << 31), %edx # paging on |
| # clear Cache Disable and not Write Though |
| andl $~((1 << 30) | (1 << 29)), %edx |
| movl %edx,%cr0 |
| jmp 0f |
| 0: |
| 118,15 → 119,11 |
|---|
| # Enable local APIC in MSR. |
| # |
| enable_l_apic_in_msr: |
| push %eax |
| |
| movl $0x1b, %ecx |
| rdmsr |
| orl $(1<<11),%eax |
| orl $(0xfee00000),%eax |
| orl $(1 << 11), %eax |
| orl $(0xfee00000), %eax |
| wrmsr |
| |
| pop %eax |
| ret |
| |
| # Clear nested flag |
| 134,7 → 131,7 |
|---|
| .macro CLEAR_NT_FLAG |
| pushfl |
| pop %ecx |
| and $0xffffbfff,%ecx |
| and $0xffffbfff, %ecx |
| push %ecx |
| popfl |
| .endm |
| 150,34 → 147,42 |
|---|
| #define INTERRUPT_ALIGN 64 |
| .macro handler i n |
| |
| .ifeq \i-0x30 # Syscall handler |
| push %ds |
| push %es |
| push %fs |
| push %gs |
| .ifeq \i - 0x30 # Syscall handler |
| pushl %ds |
| pushl %es |
| pushl %fs |
| pushl %gs |
| |
| # Push arguments on stack |
| push %edi |
| push %esi |
| push %edx |
| push %ecx |
| push %eax |
| # |
| # Push syscall arguments onto the stack |
| # |
| # NOTE: The idea behind the order of arguments passed in registers is to |
| # use all scratch registers first and preserved registers next. |
| # An optimized libc syscall wrapper can make use of this setup. |
| # |
| pushl %eax |
| pushl %ebp |
| pushl %edi |
| pushl %esi |
| pushl %ebx |
| pushl %ecx |
| pushl %edx |
| |
| # we must fill the data segment registers |
| movw $16,%ax |
| movw %ax,%ds |
| movw %ax,%es |
| movw $16, %ax |
| movw %ax, %ds |
| movw %ax, %es |
| |
| sti |
| |
| call syscall_handler # syscall_handler(ax,cx,dx,si,di) |
| # syscall_handler(edx, ecx, ebx, esi, edi, ebp, eax) |
| call syscall_handler |
| cli |
| addl $20, %esp # clean-up of parameters |
| addl $28, %esp # clean-up of parameters |
| |
| pop %gs |
| pop %fs |
| pop %es |
| pop %ds |
| popl %gs |
| popl %fs |
| popl %es |
| popl %ds |
| |
| CLEAR_NT_FLAG |
| iret |
| 188,7 → 193,7 |
|---|
| * The latter version fakes the error word on the stack so that the |
| * handlers and istate_t can be the same for both types. |
| */ |
| .iflt \i-32 |
| .iflt \i - 32 |
| .if (1 << \i) & ERROR_WORD_INTERRUPT_LIST |
| /* |
| * With error word, do nothing |
| 206,64 → 211,64 |
|---|
| subl $4, %esp |
| .endif |
| |
| push %ds |
| push %es |
| push %fs |
| push %gs |
| pushl %ds |
| pushl %es |
| pushl %fs |
| pushl %gs |
| |
| #ifdef CONFIG_DEBUG_ALLREGS |
| push %ebx |
| push %ebp |
| push %edi |
| push %esi |
| pushl %ebx |
| pushl %ebp |
| pushl %edi |
| pushl %esi |
| #else |
| sub $16, %esp |
| subl $16, %esp |
| #endif |
| push %edx |
| push %ecx |
| push %eax |
| pushl %edx |
| pushl %ecx |
| pushl %eax |
| |
| # we must fill the data segment registers |
| movw $16,%ax |
| movw %ax,%ds |
| movw %ax,%es |
| movw $16, %ax |
| movw %ax, %ds |
| movw %ax, %es |
| |
| pushl %esp # *istate |
| pushl $(\i) # intnum |
| call exc_dispatch # excdispatch(intnum, *istate) |
| addl $8,%esp # Clear arguments from stack |
| addl $8, %esp # Clear arguments from stack |
| |
| CLEAR_NT_FLAG # Modifies %ecx |
| |
| pop %eax |
| pop %ecx |
| pop %edx |
| popl %eax |
| popl %ecx |
| popl %edx |
| #ifdef CONFIG_DEBUG_ALLREGS |
| pop %esi |
| pop %edi |
| pop %ebp |
| pop %ebx |
| popl %esi |
| popl %edi |
| popl %ebp |
| popl %ebx |
| #else |
| add $16, %esp |
| addl $16, %esp |
| #endif |
| |
| pop %gs |
| pop %fs |
| pop %es |
| pop %ds |
| popl %gs |
| popl %fs |
| popl %es |
| popl %ds |
| |
| addl $4,%esp # Skip error word, no matter whether real or fake. |
| addl $4, %esp # Skip error word, no matter whether real or fake. |
| iret |
| .endif |
| |
| .align INTERRUPT_ALIGN |
| .if (\n-\i)-1 |
| handler "(\i+1)",\n |
| .if (\n- \i) - 1 |
| handler "(\i + 1)", \n |
| .endif |
| .endm |
| |
| # keep in sync with pm.h !!! |
| IDT_ITEMS=64 |
| IDT_ITEMS = 64 |
| .align INTERRUPT_ALIGN |
| interrupt_handlers: |
| h_start: |
| 273,4 → 278,4 |
|---|
| .data |
| .global interrupt_handler_size |
| |
| interrupt_handler_size: .long (h_end-h_start)/IDT_ITEMS |
| interrupt_handler_size: .long (h_end - h_start) / IDT_ITEMS |