diff options
Diffstat (limited to 'arch/arm/boot/compressed/head-ftvpci.S')
| -rw-r--r-- | arch/arm/boot/compressed/head-ftvpci.S | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/arm/boot/compressed/head-ftvpci.S b/arch/arm/boot/compressed/head-ftvpci.S new file mode 100644 index 000000000..a8c806ef3 --- /dev/null +++ b/arch/arm/boot/compressed/head-ftvpci.S @@ -0,0 +1,40 @@ +/* + * linux/arch/arm/boot/compressed/head-ftvpci.S + * + * Copyright (C) 2000 FutureTV Labs Ltd. + * + * Special startup code for FTV PCI board. + */ + + .section ".start", #alloc, #execinstr +ftv_start: + mcr p15, 0, r0, c7, c5, 0 @ flush I cache + mrc p15, 0, r0, c1, c0 + orr r0, r0, #1 << 12 + mcr p15, 0, r0, c1, c0 @ enable I cache + mov r0, #0 + mcreq p15, 0, r0, c15, c1, 2 @ enable clock switching + + /* check to see if the kernel must be relocated */ + ldr ip, =ftv_start + adr sl, ftv_start + teq ip, sl + beq 2f @ no need to copy + + /* in the wrong place -> presumably, executing out of ROM */ + sub ip, ip, sl @ displacement + ldr lr, =_start @ destination + sub sp, lr, ip @ source + ldr fp, =_edata @ end of copied area +1: ldmia sp!, {r0, r1, r2, r3, r4, r5, r6, r10} + stmia lr!, {r0, r1, r2, r3, r4, r5, r6, r10} + cmp lr, fp + ble 1b + +2: + mov r8, #0 + mov r7, #3 + b 1f +.ltorg +1: + /* fall back into head.S */ |