From a15b07104ca7bbb7093c9009c9ae1b58b4202d13 Mon Sep 17 00:00:00 2001 From: Kumar Gala Date: Fri, 15 Aug 2008 08:24:31 -0500 Subject: Update linux bootm to support ePAPR client interface 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 --- lib_ppc/bootm.c | 33 +++++++++++++++++++++++---------- 1 file changed, 23 insertions(+), 10 deletions(-) (limited to 'lib_ppc/bootm.c') diff --git a/lib_ppc/bootm.c b/lib_ppc/bootm.c index cbe5592a94..e83c860822 100644 --- a/lib_ppc/bootm.c +++ b/lib_ppc/bootm.c @@ -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 ; -- cgit