diff options
Diffstat (limited to 'lib_i386/bios_pci.S')
| -rw-r--r-- | lib_i386/bios_pci.S | 110 |
1 files changed, 55 insertions, 55 deletions
diff --git a/lib_i386/bios_pci.S b/lib_i386/bios_pci.S index e53791a..b57b726 100644 --- a/lib_i386/bios_pci.S +++ b/lib_i386/bios_pci.S @@ -1,7 +1,7 @@ /* * (C) Copyright 2002 * Daniel Engström, Omicron Ceti AB, daniel@omicron.se - * + * * See file CREDITS for list of people who contributed to this * project. * @@ -23,10 +23,10 @@ /* * x86 realmode assembly implementation of a PCI BIOS - * for platforms that use one PCI hose and configuration + * for platforms that use one PCI hose and configuration * access type 1. (The common case for low-end PC's) */ - + #include "bios.h" #define PCI_BIOS_DEBUG @@ -39,8 +39,8 @@ realmode_pci_bios_call_entry: call realmode_pci_bios RESTORE_CALLERS_STACK ret - - + + .globl realmode_pci_bios realmode_pci_bios: gs movw OFFS_AX(%bp), %ax @@ -69,7 +69,7 @@ gs movw OFFS_AX(%bp), %ax cmpb $15, %al je pci_bios_set_irq jmp unknown_function - + /*****************************************************************************/ pci_bios_present: @@ -77,31 +77,31 @@ pci_bios_present: cs incl num_pci_bios_present #endif movl $0x20494350, %eax -gs movl %eax, OFFS_EDX(%bp) +gs movl %eax, OFFS_EDX(%bp) movb $0x01, %al -gs movb %al, OFFS_AL(%bp) /* We support cfg type 1 */ - movw $0x0210, %ax /* version 2.10 */ -gs movw %ax, OFFS_BX(%bp) +gs movb %al, OFFS_AL(%bp) /* We support cfg type 1 */ + movw $0x0210, %ax /* version 2.10 */ +gs movw %ax, OFFS_BX(%bp) cs movb pci_last_bus, %al /* last bus number */ -gs movb %al, OFFS_CL(%bp) +gs movb %al, OFFS_CL(%bp) jmp clear_carry /*****************************************************************************/ /* device 0-31, function 0-7 */ -pci_bios_find_device: +pci_bios_find_device: #ifdef PCI_BIOS_DEBUG cs incl num_pci_bios_find_device #endif -gs movw OFFS_CX(%bp), %di +gs movw OFFS_CX(%bp), %di shll $16, %edi -gs movw OFFS_DX(%bp), %di /* edi now holds device in upper 16 - * bits and vendor in lower 16 bits */ -gs movw OFFS_SI(%bp), %si +gs movw OFFS_DX(%bp), %di /* edi now holds device in upper 16 + * bits and vendor in lower 16 bits */ +gs movw OFFS_SI(%bp), %si xorw %bx, %bx /* start at bus 0 dev 0 function 0 */ -pfd_loop: - xorw %ax, %ax /* dword 0 is vendor/device */ - call __pci_bios_select_register +pfd_loop: + xorw %ax, %ax /* dword 0 is vendor/device */ + call __pci_bios_select_register movw $0xcfc, %dx inl %dx, %eax cmpl %edi, %eax /* our device ? */ @@ -111,8 +111,8 @@ pfd_next_dev: movw %bx, %ax andw $3, %ax jnz pfd_function_not_zero - movw $0x000c, %ax - call __pci_bios_select_register + movw $0x000c, %ax + call __pci_bios_select_register movw $0xcfe, %dx inb %dx, %al andb $0x80, %al @@ -121,11 +121,11 @@ pfd_function_not_zero: incw %bx /* next function, overflows in to * device number, then bus number */ jmp pfd_check_bus - + pfd_not_multi_function: andw $0xfff8, %bx /* remove function bits */ addw $0x0008, %bx /* next device, overflows in to bus number */ -pfd_check_bus: +pfd_check_bus: cs movb pci_last_bus, %ah cmpb %ah, %bh ja pfd_not_found @@ -136,7 +136,7 @@ pfd_found_one: jmp pfd_next_dev pfd_done: -gs movw %bx, OFFS_BX(%bp) +gs movw %bx, OFFS_BX(%bp) jmp clear_carry pfd_not_found: @@ -149,13 +149,13 @@ pci_bios_find_class: #ifdef PCI_BIOS_DEBUG cs incl num_pci_bios_find_class #endif -gs movl OFFS_ECX(%bp), %edi - andl $0x00ffffff, %edi /* edi now holds class-code in lower 24 bits */ -gs movw OFFS_SI(%bp), %si +gs movl OFFS_ECX(%bp), %edi + andl $0x00ffffff, %edi /* edi now holds class-code in lower 24 bits */ +gs movw OFFS_SI(%bp), %si xorw %bx, %bx /* start at bus 0 dev 0 function 0 */ -pfc_loop: - movw $8, %ax /* dword 8 is class-code high 24bits */ - call __pci_bios_select_register +pfc_loop: + movw $8, %ax /* dword 8 is class-code high 24bits */ + call __pci_bios_select_register movw $0xcfc, %dx inl %dx, %eax shrl $8, %eax @@ -166,8 +166,8 @@ pfc_next_dev: /* check for multi function devices */ andw $3, %bx jnz pfc_function_not_zero - movw $0x000c, %ax - call __pci_bios_select_register + movw $0x000c, %ax + call __pci_bios_select_register movw $0xcfe, %dx inb %dx, %al andb $0x80, %al @@ -176,11 +176,11 @@ pfc_function_not_zero: incw %bx /* next function, overflows in to * device number, then bus number */ jmp pfc_check_bus - + pfc_not_multi_function: andw $0xfff8, %bx /* remove function bits */ addw $0x0008, %bx /* next device, overflows in to bus number */ -pfc_check_bus: +pfc_check_bus: cs movb pci_last_bus, %ah cmpb %ah, %bh ja pfc_not_found @@ -191,7 +191,7 @@ pfc_found_one: jmp pfc_next_dev pfc_done: -gs movw %bx, OFFS_BX(%bp) +gs movw %bx, OFFS_BX(%bp) jmp clear_carry pfc_not_found: @@ -206,24 +206,24 @@ cs incl num_pci_bios_generate_special_cycle #endif movb $0x81, %ah /* function not supported */ jmp set_carry - + /*****************************************************************************/ -pci_bios_read_cfg_byte: +pci_bios_read_cfg_byte: #ifdef PCI_BIOS_DEBUG cs incl num_pci_bios_read_cfg_byte #endif - call pci_bios_select_register + call pci_bios_select_register gs movw OFFS_DI(%bp), %dx andw $3, %dx addw $0xcfc, %dx inb %dx, %al -gs movb %al, OFFS_CL(%bp) +gs movb %al, OFFS_CL(%bp) jmp clear_carry /*****************************************************************************/ -pci_bios_read_cfg_word: +pci_bios_read_cfg_word: #ifdef PCI_BIOS_DEBUG cs incl num_pci_bios_read_cfg_word #endif @@ -232,20 +232,20 @@ gs movw OFFS_DI(%bp), %dx andw $2, %dx addw $0xcfc, %dx inw %dx, %ax -gs movw %ax, OFFS_CX(%bp) +gs movw %ax, OFFS_CX(%bp) jmp clear_carry /*****************************************************************************/ -pci_bios_read_cfg_dword: +pci_bios_read_cfg_dword: #ifdef PCI_BIOS_DEBUG cs incl num_pci_bios_read_cfg_dword #endif call pci_bios_select_register movw $0xcfc, %dx inl %dx, %eax -gs movl %eax, OFFS_ECX(%bp) +gs movl %eax, OFFS_ECX(%bp) jmp clear_carry /*****************************************************************************/ @@ -254,35 +254,35 @@ pci_bios_write_cfg_byte: #ifdef PCI_BIOS_DEBUG cs incl num_pci_bios_write_cfg_byte #endif - call pci_bios_select_register + call pci_bios_select_register gs movw OFFS_DI(%bp), %dx gs movb OFFS_CL(%bp), %al andw $3, %dx addw $0xcfc, %dx outb %al, %dx jmp clear_carry - + /*****************************************************************************/ pci_bios_write_cfg_word: #ifdef PCI_BIOS_DEBUG cs incl num_pci_bios_write_cfg_word #endif - call pci_bios_select_register + call pci_bios_select_register gs movw OFFS_DI(%bp), %dx gs movw OFFS_CX(%bp), %ax andw $2, %dx addw $0xcfc, %dx outw %ax, %dx jmp clear_carry - + /*****************************************************************************/ pci_bios_write_cfg_dword: #ifdef PCI_BIOS_DEBUG cs incl num_pci_bios_write_cfg_dword #endif - call pci_bios_select_register + call pci_bios_select_register gs movl OFFS_ECX(%bp), %eax movw $0xcfc, %dx outl %eax, %dx @@ -296,7 +296,7 @@ cs incl num_pci_bios_get_irq_routing #endif movb $0x81, %ah /* function not supported */ jmp set_carry - + /*****************************************************************************/ pci_bios_set_irq: @@ -316,7 +316,7 @@ cs incl num_pci_bios_unknown_function jmp set_carry /*****************************************************************************/ - + pci_bios_select_register: gs movw OFFS_BX(%bp), %bx gs movw OFFS_DI(%bp), %ax @@ -339,11 +339,11 @@ gs movw OFFS_FLAGS(%bp), %ax andw $0xfffe, %ax /* clear carry -- function succeeded */ gs movw %ax, OFFS_FLAGS(%bp) xorw %ax, %ax -gs movb %ah, OFFS_AH(%bp) +gs movb %ah, OFFS_AH(%bp) ret set_carry: -gs movb %ah, OFFS_AH(%bp) +gs movb %ah, OFFS_AH(%bp) gs movw OFFS_FLAGS(%bp), %ax orw $1, %ax /* return carry -- function not supported */ gs movw %ax, OFFS_FLAGS(%bp) @@ -360,7 +360,7 @@ pci_last_bus: .globl num_pci_bios_present num_pci_bios_present: .long 0 - + .globl num_pci_bios_find_device num_pci_bios_find_device: .long 0 @@ -370,9 +370,9 @@ num_pci_bios_find_class: .long 0 .globl num_pci_bios_generate_special_cycle -num_pci_bios_generate_special_cycle: +num_pci_bios_generate_special_cycle: .long 0 - + .globl num_pci_bios_read_cfg_byte num_pci_bios_read_cfg_byte: .long 0 |