CRIS v32: Update boot/rescue/head.S code.

- Add ifdef for ETRAX_AXISFLASHMAP to avoid compiling file unless it is set.
- Use assembler macros for setting up clocks.
- Don't copy image, just jump to it (only works for NOR flash)
This commit is contained in:
Jesper Nilsson 2007-11-30 17:20:00 +01:00
parent a5d204bf36
commit 3f50c0673c

View file

@ -1,38 +1,26 @@
/* $Id: head.S,v 1.4 2004/11/01 16:10:28 starvik Exp $
/*
* Just get started by jumping to CONFIG_ETRAX_PTABLE_SECTOR to start
* kernel decompressor.
*
* In practice, this only works for NOR flash (or some convoluted RAM boot)
* and hence is not really useful for Artpec-3, so it's Etrax FS / NOR only.
*
* This used to be the rescue code but now that is handled by the
* RedBoot based RFL instead. Nothing to see here, move along.
*/
#include <asm/arch/hwregs/reg_map_asm.h>
#include <asm/arch/hwregs/config_defs_asm.h>
#include <mach/startup.inc>
#ifdef CONFIG_ETRAX_AXISFLASHMAP
;; Code
.text
start:
;; Start clocks for used blocks.
move.d REG_ADDR(config, regi_config, rw_clk_ctrl), $r1
move.d [$r1], $r0
or.d REG_STATE(config, rw_clk_ctrl, cpu, yes) | \
REG_STATE(config, rw_clk_ctrl, bif, yes) | \
REG_STATE(config, rw_clk_ctrl, fix_io, yes), $r0
move.d $r0, [$r1]
START_CLOCKS
;; Copy 68KB NAND flash to Internal RAM (if NAND boot)
move.d 0x38004000, $r10
move.d 0x8000, $r11
move.d 0x11000, $r12
move.d copy_complete, $r13
and.d 0x000fffff, $r13
or.d 0x38000000, $r13
#include "../../lib/nand_init.S"
;; No NAND found
move.d CONFIG_ETRAX_PTABLE_SECTOR, $r10
jump $r10 ; Jump to decompresser
jump $r10 ; Jump to decompressor
nop
copy_complete:
move.d 0x38000000 + CONFIG_ETRAX_PTABLE_SECTOR, $r10
jump $r10 ; Jump to decompresser
nop
#endif