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| author | Paolo Bonzini <pbonzini@redhat.com> | 2019-07-23 19:45:15 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-07-24 11:00:15 +0200 |
| commit | e7fc653f44247f1008509a68bf9b666e33fea0e5 (patch) | |
| tree | 8c5518432f79a8f45d575d9f76e9be1e90431bdb /entry.S | |
| parent | c476b5c67199b44523084b7639a4ff52f437156b (diff) | |
| download | qboot-e7fc653f44247f1008509a68bf9b666e33fea0e5.zip qboot-e7fc653f44247f1008509a68bf9b666e33fea0e5.tar.gz qboot-e7fc653f44247f1008509a68bf9b666e33fea0e5.tar.bz2 | |
implement PCIBIOS specification
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'entry.S')
| -rw-r--r-- | entry.S | 45 |
1 files changed, 45 insertions, 0 deletions
@@ -91,3 +91,48 @@ ENTRY(bios_int15) IRET ENTRY_END(bios_int15) + + .code32 +ENTRY(pcibios_entry) + clc + pushfl + SAVE_BIOSREGS + + movl %esp, %eax + call pcibios_handler + + RESTORE_BIOSREGS + popfl + lretl +ENTRY_END(pcibios_entry) + +ENTRY(bios32_entry) + pushfl + testl %ebx, %ebx /* BIOS32 service directory? */ + jnz 2f + cmp $0x49435024, %eax /* "$PCI"? */ + movb $0x80, %al /* service not present */ + jne 1f + xorl %ebx, %ebx /* fill in base/length/entry */ + movl $(1 << 20), %ecx + movl $pcibios_entry, %edx + movb $0x00, %al /* service present */ +1: + popfl + lretl +2: + movb $0x81, %al /* unimplemented function */ + popfl + lretl +ENTRY_END(bios32_entry) + +ENTRY(pic_base) + call 1f +2: + ret +1: + popl %eax + pushl %eax + subl $2b, %eax + ret /* return to 2b */ +ENTRY_END(pic_base) |