mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 08:07:10 +07:00
160 lines
2.8 KiB
ArmAsm
160 lines
2.8 KiB
ArmAsm
#include <linux/linkage.h>
|
|
|
|
#include <asm/asm-offsets.h>
|
|
#include <asm/page.h>
|
|
#include <asm/setup.h>
|
|
|
|
|
|
#define MMU_BASE 8 /* MMU flags base in cpu_mmu_flags */
|
|
|
|
.text
|
|
|
|
ENTRY(relocate_new_kernel)
|
|
movel %sp@(4),%a0 /* a0 = ptr */
|
|
movel %sp@(8),%a1 /* a1 = start */
|
|
movel %sp@(12),%d1 /* d1 = cpu_mmu_flags */
|
|
movew #PAGE_MASK,%d2 /* d2 = PAGE_MASK */
|
|
|
|
/* Disable MMU */
|
|
|
|
btst #MMU_BASE + MMUB_68851,%d1
|
|
jeq 3f
|
|
|
|
1: /* 68851 or 68030 */
|
|
|
|
lea %pc@(.Lcopy),%a4
|
|
2: addl #0x00000000,%a4 /* virt_to_phys() */
|
|
|
|
.section ".m68k_fixup","aw"
|
|
.long M68K_FIXUP_MEMOFFSET, 2b+2
|
|
.previous
|
|
|
|
.chip 68030
|
|
pmove %tc,%d0 /* Disable MMU */
|
|
bclr #7,%d0
|
|
pmove %d0,%tc
|
|
jmp %a4@ /* Jump to physical .Lcopy */
|
|
.chip 68k
|
|
|
|
3:
|
|
btst #MMU_BASE + MMUB_68030,%d1
|
|
jne 1b
|
|
|
|
btst #MMU_BASE + MMUB_68040,%d1
|
|
jeq 6f
|
|
|
|
4: /* 68040 or 68060 */
|
|
|
|
lea %pc@(.Lcont040),%a4
|
|
5: addl #0x00000000,%a4 /* virt_to_phys() */
|
|
|
|
.section ".m68k_fixup","aw"
|
|
.long M68K_FIXUP_MEMOFFSET, 5b+2
|
|
.previous
|
|
|
|
movel %a4,%d0
|
|
andl #0xff000000,%d0
|
|
orw #0xe020,%d0 /* Map 16 MiB, enable, cacheable */
|
|
.chip 68040
|
|
movec %d0,%itt0
|
|
movec %d0,%dtt0
|
|
.chip 68k
|
|
jmp %a4@ /* Jump to physical .Lcont040 */
|
|
|
|
.Lcont040:
|
|
moveq #0,%d0
|
|
.chip 68040
|
|
movec %d0,%tc /* Disable MMU */
|
|
movec %d0,%itt0
|
|
movec %d0,%itt1
|
|
movec %d0,%dtt0
|
|
movec %d0,%dtt1
|
|
.chip 68k
|
|
jra .Lcopy
|
|
|
|
6:
|
|
btst #MMU_BASE + MMUB_68060,%d1
|
|
jne 4b
|
|
|
|
.Lcopy:
|
|
movel %a0@+,%d0 /* d0 = entry = *ptr */
|
|
jeq .Lflush
|
|
|
|
btst #2,%d0 /* entry & IND_DONE? */
|
|
jne .Lflush
|
|
|
|
btst #1,%d0 /* entry & IND_INDIRECTION? */
|
|
jeq 1f
|
|
andw %d2,%d0
|
|
movel %d0,%a0 /* ptr = entry & PAGE_MASK */
|
|
jra .Lcopy
|
|
|
|
1:
|
|
btst #0,%d0 /* entry & IND_DESTINATION? */
|
|
jeq 2f
|
|
andw %d2,%d0
|
|
movel %d0,%a2 /* a2 = dst = entry & PAGE_MASK */
|
|
jra .Lcopy
|
|
|
|
2:
|
|
btst #3,%d0 /* entry & IND_SOURCE? */
|
|
jeq .Lcopy
|
|
|
|
andw %d2,%d0
|
|
movel %d0,%a3 /* a3 = src = entry & PAGE_MASK */
|
|
movew #PAGE_SIZE/32 - 1,%d0 /* d0 = PAGE_SIZE/32 - 1 */
|
|
3:
|
|
movel %a3@+,%a2@+ /* *dst++ = *src++ */
|
|
movel %a3@+,%a2@+ /* *dst++ = *src++ */
|
|
movel %a3@+,%a2@+ /* *dst++ = *src++ */
|
|
movel %a3@+,%a2@+ /* *dst++ = *src++ */
|
|
movel %a3@+,%a2@+ /* *dst++ = *src++ */
|
|
movel %a3@+,%a2@+ /* *dst++ = *src++ */
|
|
movel %a3@+,%a2@+ /* *dst++ = *src++ */
|
|
movel %a3@+,%a2@+ /* *dst++ = *src++ */
|
|
dbf %d0, 3b
|
|
jra .Lcopy
|
|
|
|
.Lflush:
|
|
/* Flush all caches */
|
|
|
|
btst #CPUB_68020,%d1
|
|
jeq 2f
|
|
|
|
1: /* 68020 or 68030 */
|
|
.chip 68030
|
|
movec %cacr,%d0
|
|
orw #0x808,%d0
|
|
movec %d0,%cacr
|
|
.chip 68k
|
|
jra .Lreincarnate
|
|
|
|
2:
|
|
btst #CPUB_68030,%d1
|
|
jne 1b
|
|
|
|
btst #CPUB_68040,%d1
|
|
jeq 4f
|
|
|
|
3: /* 68040 or 68060 */
|
|
.chip 68040
|
|
nop
|
|
cpusha %bc
|
|
nop
|
|
cinva %bc
|
|
nop
|
|
.chip 68k
|
|
jra .Lreincarnate
|
|
|
|
4:
|
|
btst #CPUB_68060,%d1
|
|
jne 3b
|
|
|
|
.Lreincarnate:
|
|
jmp %a1@
|
|
|
|
relocate_new_kernel_end:
|
|
|
|
ENTRY(relocate_new_kernel_size)
|
|
.long relocate_new_kernel_end - relocate_new_kernel
|