diff options
| author | David Teigland <teigland@redhat.com> | 2006-01-18 09:14:51 (GMT) |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2006-01-18 09:14:51 (GMT) |
| commit | 2ff4782374dde5e3d76daf8a82eae396c0f76567 (patch) | |
| tree | 42cc821174a3f3f410895fce16741948a1103e66 /arch/sh/kernel/relocate_kernel.S | |
| parent | cd1344fe322cd9d95b2c0f011d6766677cfcb29b (diff) | |
| parent | 7eb9b2f56c9812d03ac63031869bcc42151067b1 (diff) | |
| download | linux-2ff4782374dde5e3d76daf8a82eae396c0f76567.tar.xz | |
Merge branch 'master'
Diffstat (limited to 'arch/sh/kernel/relocate_kernel.S')
| -rw-r--r-- | arch/sh/kernel/relocate_kernel.S | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/arch/sh/kernel/relocate_kernel.S b/arch/sh/kernel/relocate_kernel.S new file mode 100644 index 0000000..b0695cf --- /dev/null +++ b/arch/sh/kernel/relocate_kernel.S @@ -0,0 +1,102 @@ +/* + * relocate_kernel.S - put the kernel image in place to boot + * 2005.9.17 kogiidena@eggplant.ddo.jp + * + * LANDISK/sh4 is supported. Maybe, SH archtecture works well. + * + * This source code is licensed under the GNU General Public License, + * Version 2. See the file COPYING for more details. + */ + +#include <linux/config.h> +#include <linux/linkage.h> + +#define PAGE_SIZE 4096 /* must be same value as in <asm/page.h> */ + + + .globl relocate_new_kernel +relocate_new_kernel: + /* r4 = indirection_page */ + /* r5 = reboot_code_buffer */ + /* r6 = start_address */ + /* r7 = vbr_reg */ + + mov.l 10f,r8 /* 4096 */ + mov.l 11f,r9 /* 0xa0000000 */ + + /* stack setting */ + add r8,r5 + mov r5,r15 + + bra 1f + mov r4,r0 /* cmd = indirection_page */ +0: + mov.l @r4+,r0 /* cmd = *ind++ */ + +1: /* addr = (cmd | 0xa0000000) & 0xfffffff0 */ + mov r0,r2 + or r9,r2 + mov #-16,r1 + and r1,r2 + + /* if(cmd & IND_DESTINATION) dst = addr */ + tst #1,r0 + bt 2f + bra 0b + mov r2,r5 + +2: /* else if(cmd & IND_INDIRECTION) ind = addr */ + tst #2,r0 + bt 3f + bra 0b + mov r2,r4 + +3: /* else if(cmd & IND_DONE) goto 6 */ + tst #4,r0 + bt 4f + bra 6f + nop + +4: /* else if(cmd & IND_SOURCE) memcpy(dst,addr,PAGE_SIZE) */ + tst #8,r0 + bt 0b + + mov r8,r3 + shlr2 r3 + shlr2 r3 +5: + dt r3 + mov.l @r2+,r1 /* 16n+0 */ + mov.l r1,@r5 + add #4,r5 + mov.l @r2+,r1 /* 16n+4 */ + mov.l r1,@r5 + add #4,r5 + mov.l @r2+,r1 /* 16n+8 */ + mov.l r1,@r5 + add #4,r5 + mov.l @r2+,r1 /* 16n+12 */ + mov.l r1,@r5 + add #4,r5 + bf 5b + + bra 0b + nop +6: +#ifdef CONFIG_SH_STANDARD_BIOS + ldc r7, vbr +#endif + jmp @r6 + nop + + .align 2 +10: + .long PAGE_SIZE +11: + .long 0xa0000000 + +relocate_new_kernel_end: + + .globl relocate_new_kernel_size +relocate_new_kernel_size: + .long relocate_new_kernel_end - relocate_new_kernel |