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Update linux bootm to support ePAPR client interface

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The ePAPR spec has some subtle differences from the current device
tree based boot interface to the powerpc linux kernel. The powerpc
linux kernel currently ignores the differences that ePAPR specifies.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Kumar Gala 2008-08-15 08:24:31 -05:00 committed by Wolfgang Denk
parent b734e5556a
commit a15b07104c
1 changed files with 23 additions and 10 deletions
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33
lib_ppc/bootm.c
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@ -80,7 +80,8 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
ulong cmd_start, cmd_end, bootmap_base;
bd_t *kbd;
ulong ep = 0;
void (*kernel)(bd_t *, ulong, ulong, ulong, ulong);
void (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
ulong r7, ulong r8, ulong r9);
int ret;
ulong of_size = 0;
struct lmb *lmb = images->lmb;
@ -166,8 +167,8 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
puts ("Could not find kernel entry point!\n");
goto error;
}
kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))ep;
kernel = (void (*)(bd_t *, ulong, ulong, ulong,
ulong, ulong, ulong))ep;
/* find ramdisk */
ret = boot_get_ramdisk (argc, argv, images, IH_ARCH_PPC,
&rd_data_start, &rd_data_end);
@ -282,14 +283,23 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
if (of_flat_tree) { /* device tree; boot new style */
/*
* Linux Kernel Parameters (passing device tree):
* r3: pointer to the fdt, followed by the board info data
* r4: physical pointer to the kernel itself
* r5: NULL
* r6: NULL
* r7: NULL
* r3: pointer to the fdt
* r4: 0
* r5: 0
* r6: epapr magic
* r7: size of IMA in bytes
* r8: 0
* r9: 0
*/
#if defined(CONFIG_85xx) || defined(CONFIG_440)
#define EPAPR_MAGIC (0x45504150)
#else
#define EPAPR_MAGIC (0x65504150)
#endif
debug (" Booting using OF flat tree...\n");
(*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0);
(*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
CFG_BOOTMAPSZ, 0, 0);
/* does not return */
} else
#endif
@ -301,9 +311,12 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
* r5: initrd_end - unused if r4 is 0
* r6: Start of command line string
* r7: End of command line string
* r8: 0
* r9: 0
*/
debug (" Booting using board info...\n");
(*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
(*kernel) (kbd, initrd_start, initrd_end,
cmd_start, cmd_end, 0, 0);
/* does not return */
}
return ;