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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/m68knommu/platform/68328/head-rom.S | |
download | op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/m68knommu/platform/68328/head-rom.S')
-rw-r--r-- | arch/m68knommu/platform/68328/head-rom.S | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/arch/m68knommu/platform/68328/head-rom.S b/arch/m68knommu/platform/68328/head-rom.S new file mode 100644 index 0000000..2b448a2 --- /dev/null +++ b/arch/m68knommu/platform/68328/head-rom.S @@ -0,0 +1,109 @@ +#include <linux/config.h> + + .global _start + .global _stext + + .global _rambase + .global _ramvec + .global _ramstart + .global _ramend + +#ifdef CONFIG_INIT_LCD + .global splash_bits +#endif + + .data + +/* + * Set up the usable of RAM stuff. Size of RAM is determined then + * an initial stack set up at the end. + */ +.align 4 +_ramvec: +.long 0 +_rambase: +.long 0 +_ramstart: +.long 0 +_ramend: +.long 0 + +#ifdef CONFIG_INIT_LCD +splash_bits: +#include "bootlogo.rh" +#endif + + .text +_start: +_stext: movew #0x2700,%sr +#ifdef CONFIG_INIT_LCD + movel #splash_bits, 0xfffffA00 /* LSSA */ + moveb #0x28, 0xfffffA05 /* LVPW */ + movew #0x280, 0xFFFFFa08 /* LXMAX */ + movew #0x1df, 0xFFFFFa0a /* LYMAX */ + moveb #0, 0xfffffa29 /* LBAR */ + moveb #0, 0xfffffa25 /* LPXCD */ + moveb #0x08, 0xFFFFFa20 /* LPICF */ + moveb #0x01, 0xFFFFFA21 /* -ve pol */ + moveb #0x81, 0xfffffA27 /* LCKCON */ + movew #0xff00, 0xfffff412 /* LCD pins */ +#endif + moveal #__ramend-CONFIG_MEMORY_RESERVE*0x100000 - 0x10, %sp + movew #32767, %d0 /* PLL settle wait loop */ +1: subq #1, %d0 + bne 1b + + /* Copy data segment from ROM to RAM */ + moveal #_etext, %a0 + moveal #_sdata, %a1 + moveal #_edata, %a2 + + /* Copy %a0 to %a1 until %a1 == %a2 */ +1: movel %a0@+, %a1@+ + cmpal %a1, %a2 + bhi 1b + + moveal #_sbss, %a0 + moveal #_ebss, %a1 + /* Copy 0 to %a0 until %a0 == %a1 */ + +1: + clrl %a0@+ + cmpal %a0, %a1 + bhi 1b + + movel #_sdata, %d0 + movel %d0, _rambase + movel #_ebss, %d0 + movel %d0, _ramstart + movel #__ramend-CONFIG_MEMORY_RESERVE*0x100000, %d0 + movel %d0, _ramend + movel #__ramvec, %d0 + movel %d0, _ramvec + +/* + * load the current task pointer and stack + */ + lea init_thread_union, %a0 + lea 0x2000(%a0), %sp + +1: jsr start_kernel + bra 1b +_exit: + + jmp _exit + + +putc: + moveb %d7,0xfffff907 +1: + movew 0xfffff906, %d7 + andw #0x2000, %d7 + beq 1b + rts + + .data +env: + .long 0 + .text + |