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grub/grub-core/kern/mips/cache.S

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Deduplicated cache handling. Fixed jump hatch being filled with random stuff
2009-11-28 22:34:48 +00:00
kernel.img compiles on mipsel-qemu-r4k
2009-10-09 17:50:31 +00:00
#include <grub/symbol.h>
asm part for mips decompressor
2010-09-21 08:14:08 +00:00
.set noreorder
C part of decompressor
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.set nomacro
asm part for mips decompressor
2010-09-21 08:14:08 +00:00
cache handling
2009-10-17 22:23:00 +00:00
FUNCTION (grub_arch_sync_caches)
Deduplicated cache handling. Fixed jump hatch being filled with random stuff
2009-11-28 22:34:48 +00:00
#include "cache_flush.S"
Fixed cache invalidating
2009-11-22 23:16:49 +00:00
j $ra
mips/cache: Add missing nop's in delay slots Lack of them causes random instructions to be executed before the jump really happens. Signed-off-by: Vladimir Serbinenko <phcoder@google.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
2020-05-15 12:30:07 +00:00
nop
Flush caches on DMA memory. * grub-core/kern/mips/cache.S (grub_arch_sync_dma_caches): New function. * grub-core/bus/pci.c (grub_memalign_dma32): Flush caches. (grub_dma_free): Likewise. * include/grub/cache.h (grub_arch_sync_dma_caches): New declaration.
2011-05-13 18:56:50 +00:00
FUNCTION (grub_arch_sync_dma_caches)
move $t2, $a0
addu $t3, $a0, $a1
srl $t2, $t2, 5
sll $t2, $t2, 5
addu $t3, $t3, 0x1f
srl $t3, $t3, 5
sll $t3, $t3, 5
move $t0, $t2
subu $t1, $t3, $t2
1:
Remove -march=mips3 from TARGET_CCASFLAGS as it creates linking problem when rest of GRUB is compiled for hisher stepping. Instead use .set mips3/.set mips1 around cache and sync opcodes.
2013-11-22 03:36:53 +00:00
cache_op 1, 0($t0)
Avoid flushing the same line multiple times on loongson. * grub-core/kern/mips/cache.S [GRUB_MACHINE_MIPS_LOONGSON]: Step in 32 bytes and not 1 byte. * grub-core/kern/mips/cache_flush.S [GRUB_MACHINE_MIPS_LOONGSON]: Likewise.
2012-06-22 21:36:33 +00:00
#ifdef GRUB_MACHINE_MIPS_LOONGSON
Remove -march=mips3 from TARGET_CCASFLAGS as it creates linking problem when rest of GRUB is compiled for hisher stepping. Instead use .set mips3/.set mips1 around cache and sync opcodes.
2013-11-22 03:36:53 +00:00
cache_op 1, 1($t0)
cache_op 1, 2($t0)
cache_op 1, 3($t0)
Avoid flushing the same line multiple times on loongson. * grub-core/kern/mips/cache.S [GRUB_MACHINE_MIPS_LOONGSON]: Step in 32 bytes and not 1 byte. * grub-core/kern/mips/cache_flush.S [GRUB_MACHINE_MIPS_LOONGSON]: Likewise.
2012-06-22 21:36:33 +00:00
addiu $t1, $t1, -0x20
bne $t1, $zero, 1b
addiu $t0, $t0, 0x20
#else
addiu $t1, $t1, -4
Flush caches on DMA memory. * grub-core/kern/mips/cache.S (grub_arch_sync_dma_caches): New function. * grub-core/bus/pci.c (grub_memalign_dma32): Flush caches. (grub_dma_free): Likewise. * include/grub/cache.h (grub_arch_sync_dma_caches): New declaration.
2011-05-13 18:56:50 +00:00
bne $t1, $zero, 1b
Avoid flushing the same line multiple times on loongson. * grub-core/kern/mips/cache.S [GRUB_MACHINE_MIPS_LOONGSON]: Step in 32 bytes and not 1 byte. * grub-core/kern/mips/cache_flush.S [GRUB_MACHINE_MIPS_LOONGSON]: Likewise.
2012-06-22 21:36:33 +00:00
addiu $t0, $t0, 0x4
#endif
Remove -march=mips3 from TARGET_CCASFLAGS as it creates linking problem when rest of GRUB is compiled for hisher stepping. Instead use .set mips3/.set mips1 around cache and sync opcodes.
2013-11-22 03:36:53 +00:00
sync_op
Flush caches on DMA memory. * grub-core/kern/mips/cache.S (grub_arch_sync_dma_caches): New function. * grub-core/bus/pci.c (grub_memalign_dma32): Flush caches. (grub_dma_free): Likewise. * include/grub/cache.h (grub_arch_sync_dma_caches): New declaration.
2011-05-13 18:56:50 +00:00
move $t0, $t2
subu $t1, $t3, $t2
2:
Avoid flushing the same line multiple times on loongson. * grub-core/kern/mips/cache.S [GRUB_MACHINE_MIPS_LOONGSON]: Step in 32 bytes and not 1 byte. * grub-core/kern/mips/cache_flush.S [GRUB_MACHINE_MIPS_LOONGSON]: Likewise.
2012-06-22 21:36:33 +00:00
#ifdef GRUB_MACHINE_MIPS_LOONGSON
Remove -march=mips3 from TARGET_CCASFLAGS as it creates linking problem when rest of GRUB is compiled for hisher stepping. Instead use .set mips3/.set mips1 around cache and sync opcodes.
2013-11-22 03:36:53 +00:00
cache_op 0, 0($t0)
Avoid flushing the same line multiple times on loongson. * grub-core/kern/mips/cache.S [GRUB_MACHINE_MIPS_LOONGSON]: Step in 32 bytes and not 1 byte. * grub-core/kern/mips/cache_flush.S [GRUB_MACHINE_MIPS_LOONGSON]: Likewise.
2012-06-22 21:36:33 +00:00
addiu $t1, $t1, -0x20
bne $t1, $zero, 2b
addiu $t0, $t0, 0x20
#else
Remove -march=mips3 from TARGET_CCASFLAGS as it creates linking problem when rest of GRUB is compiled for hisher stepping. Instead use .set mips3/.set mips1 around cache and sync opcodes.
2013-11-22 03:36:53 +00:00
cache_op 0, 0($t0)
Avoid flushing the same line multiple times on loongson. * grub-core/kern/mips/cache.S [GRUB_MACHINE_MIPS_LOONGSON]: Step in 32 bytes and not 1 byte. * grub-core/kern/mips/cache_flush.S [GRUB_MACHINE_MIPS_LOONGSON]: Likewise.
2012-06-22 21:36:33 +00:00
addiu $t1, $t1, -4
Flush caches on DMA memory. * grub-core/kern/mips/cache.S (grub_arch_sync_dma_caches): New function. * grub-core/bus/pci.c (grub_memalign_dma32): Flush caches. (grub_dma_free): Likewise. * include/grub/cache.h (grub_arch_sync_dma_caches): New declaration.
2011-05-13 18:56:50 +00:00
bne $t1, $zero, 2b
Avoid flushing the same line multiple times on loongson. * grub-core/kern/mips/cache.S [GRUB_MACHINE_MIPS_LOONGSON]: Step in 32 bytes and not 1 byte. * grub-core/kern/mips/cache_flush.S [GRUB_MACHINE_MIPS_LOONGSON]: Likewise.
2012-06-22 21:36:33 +00:00
addiu $t0, $t0, 0x4
#endif
Remove -march=mips3 from TARGET_CCASFLAGS as it creates linking problem when rest of GRUB is compiled for hisher stepping. Instead use .set mips3/.set mips1 around cache and sync opcodes.
2013-11-22 03:36:53 +00:00
sync_op
Flush caches on DMA memory. * grub-core/kern/mips/cache.S (grub_arch_sync_dma_caches): New function. * grub-core/bus/pci.c (grub_memalign_dma32): Flush caches. (grub_dma_free): Likewise. * include/grub/cache.h (grub_arch_sync_dma_caches): New declaration.
2011-05-13 18:56:50 +00:00
move $t0, $t2
subu $t1, $t3, $t2
2:
Avoid flushing the same line multiple times on loongson. * grub-core/kern/mips/cache.S [GRUB_MACHINE_MIPS_LOONGSON]: Step in 32 bytes and not 1 byte. * grub-core/kern/mips/cache_flush.S [GRUB_MACHINE_MIPS_LOONGSON]: Likewise.
2012-06-22 21:36:33 +00:00
#ifdef GRUB_MACHINE_MIPS_LOONGSON
Remove -march=mips3 from TARGET_CCASFLAGS as it creates linking problem when rest of GRUB is compiled for hisher stepping. Instead use .set mips3/.set mips1 around cache and sync opcodes.
2013-11-22 03:36:53 +00:00
cache_op 23, 0($t0)
Avoid flushing the same line multiple times on loongson. * grub-core/kern/mips/cache.S [GRUB_MACHINE_MIPS_LOONGSON]: Step in 32 bytes and not 1 byte. * grub-core/kern/mips/cache_flush.S [GRUB_MACHINE_MIPS_LOONGSON]: Likewise.
2012-06-22 21:36:33 +00:00
addiu $t1, $t1, -0x20
bne $t1, $zero, 2b
addiu $t0, $t0, 0x20
#else
Remove -march=mips3 from TARGET_CCASFLAGS as it creates linking problem when rest of GRUB is compiled for hisher stepping. Instead use .set mips3/.set mips1 around cache and sync opcodes.
2013-11-22 03:36:53 +00:00
cache_op 23, 0($t0)
Avoid flushing the same line multiple times on loongson. * grub-core/kern/mips/cache.S [GRUB_MACHINE_MIPS_LOONGSON]: Step in 32 bytes and not 1 byte. * grub-core/kern/mips/cache_flush.S [GRUB_MACHINE_MIPS_LOONGSON]: Likewise.
2012-06-22 21:36:33 +00:00
addiu $t1, $t1, -0x4
Flush caches on DMA memory. * grub-core/kern/mips/cache.S (grub_arch_sync_dma_caches): New function. * grub-core/bus/pci.c (grub_memalign_dma32): Flush caches. (grub_dma_free): Likewise. * include/grub/cache.h (grub_arch_sync_dma_caches): New declaration.
2011-05-13 18:56:50 +00:00
bne $t1, $zero, 2b
Avoid flushing the same line multiple times on loongson. * grub-core/kern/mips/cache.S [GRUB_MACHINE_MIPS_LOONGSON]: Step in 32 bytes and not 1 byte. * grub-core/kern/mips/cache_flush.S [GRUB_MACHINE_MIPS_LOONGSON]: Likewise.
2012-06-22 21:36:33 +00:00
addiu $t0, $t0, 0x4
#endif
Remove -march=mips3 from TARGET_CCASFLAGS as it creates linking problem when rest of GRUB is compiled for hisher stepping. Instead use .set mips3/.set mips1 around cache and sync opcodes.
2013-11-22 03:36:53 +00:00
sync_op
Flush caches on DMA memory. * grub-core/kern/mips/cache.S (grub_arch_sync_dma_caches): New function. * grub-core/bus/pci.c (grub_memalign_dma32): Flush caches. (grub_dma_free): Likewise. * include/grub/cache.h (grub_arch_sync_dma_caches): New declaration.
2011-05-13 18:56:50 +00:00
mips: Fix soft-float handling. Add -msoft-float alongside clang arguments to specify ABI. Specify ABI in asm files explicitly. This trigers asm warning due to gcc failing to propagate -msoft-float but it's tolerable.
2015-02-23 21:33:28 +00:00
jr $ra
mips/cache: Add missing nop's in delay slots Lack of them causes random instructions to be executed before the jump really happens. Signed-off-by: Vladimir Serbinenko <phcoder@google.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
2020-05-15 12:30:07 +00:00
nop
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