Emulation/switch-coreboot
1
0
Fork 0
mirror of https://github.com/fail0verflow/switch-coreboot.git synced 2025-05-04 01:39:18 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

This might actually work!

Browse source
This commit is contained in:
Ronald G. Minnich 2000-12-09 14:56:54 +00:00
parent 7fb6bba49f
commit a5a4445593
1 changed files with 28 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

37
src/northbridge/acer/m1631/ipl.S
View file

@ -62,6 +62,7 @@ _realstart:
movw $0x10, %bx
movw %bx, %es
movw %bx, %ds
movw %bx, %ss
#ifdef USE_BIG_REAL
andb $0xfe, %al
movl %eax, %cr0
@ -207,18 +208,23 @@ sizeram:
#define DOC_SPL_SIZE_IN_PAGE 126 /* 1 page = 512 bytes, total 63kB */
ipl_start:
#if 0
/* stack and es already set. */
/* O.K. we have DRAM now, so set up STACK for CALL/RET */
movw $DOC_STACK_SEG, %ax
movw %ax, %ss
movw $SPL_RAM_SEG, %ax
movw %ax, %es
xorl %sp, %sp # clear %sp
#endif
/* NOTE: in ollie's original code, %ds was at 0xfe00, i.e.
* 0xfe000, i.e. base of DoC. We have to adjust for that when
* we set %edi and %esi
*/
movl $0x4000, %esp # set %sp
xorl %edx, %edx # clear %dx, start of RAM
xorl %esi, %esi
xorl %edi, %edi
movw $0x800, %si # point %si to CDSN Data area
movw $0x1000, %di # point %di to CDSN Control area
movl $0xfe800, %esi # point %si to CDSN Data area
movl $0xff000, %edi # point %di to CDSN Control area
movl $DOC_SPL_START_BLK, %ebp # start page of LinuxBIOS
movb $0x84, %al # Reset DOC Millennium
@ -228,7 +234,7 @@ ipl_start:
call doc_reset
read_next_page:
movw $0x1000, %di # point %di to CDSN Control area
movl $0xff000, %edi # point %di to CDSN Control area
flash_command:
movb $0x03, 0x04(%edi) # start command cycle
@ -265,12 +271,12 @@ doc_delay:
movb 0x1d(%edi), %al # init read pipeline
movw $0x100, %cx # 1 page = 512 bytes
movw $0x800, %si # point %si to CDSN Data area
movw %dx, %di # restore saved current destination
movl $0xfe800, %esi # point %si to CDSN Data area
movl %edx, %edi # restore saved current destination
rep
movsw
movw %di, %dx # save current destination
movl %edi, %edx # save current destination
incw %bp # increse current page number
cmpw $128, %bp # moved 63 KB ??
jl read_next_page # no, read next page
@ -278,6 +284,19 @@ doc_delay:
sis630ipl_end:
jmp spl_vector # jump to SPL vector
doc_reset:
/* Input: AL = value write to DOC_CONTROL register
Clobberd: CX */
movb %al, 0x02(%edi) # write DoC Control retister
movb %al, 0x02(%edi) # twice
ret # End of doc_reset
doc_cycle_end:
movb $0x00, 0x1e(%edi) # flush write pepeline
movb $0x01, 0x04(%edi) # end command cycle
ret
/* we don't need these. We only do I/O to MCR 0 */
#if 0
pci_write_dword: