Add a boot command that supports the ePAPR client interface on powerpc.
Signed-off-by: Kumar Gala galak@kernel.crashing.org --- lib_ppc/bootm.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 63 insertions(+), 0 deletions(-)
diff --git a/lib_ppc/bootm.c b/lib_ppc/bootm.c index a872d31..1182c50 100644 --- a/lib_ppc/bootm.c +++ b/lib_ppc/bootm.c @@ -821,3 +821,66 @@ error: return 1; } #endif + +/*******************************************************************/ +/* boote - boot ePAPR */ +/*******************************************************************/ +#if defined(CONFIG_CMD_BOOT_EPAPR) +int do_boot_epapr (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + void (*kernel)(ulong r3, ulong r4, ulong r5, ulong r6, + ulong r7, ulong r8, ulong r9); + ulong kern, of_flat_tree, epapr_magic; + + if (argc != 3) { + printf ("Usage:\n%s\n", cmdtp->usage); + return 1; + } + + kern = simple_strtoul (argv[1], NULL, 16); + of_flat_tree = simple_strtoul (argv[2], NULL, 16); + + if (kern & 0x3) { + printf ("kernel address 0x%lx is not 4-byte aligned\n", kern); + return 1; + } + + if (of_flat_tree & 0x7) { + printf ("Flat device tree address 0x%lx is not 8-byte aligned\n", of_flat_tree); + return 1; + } + + kernel = (void (*)(ulong, ulong, ulong, ulong, + ulong, ulong, ulong))kern; + + disable_interrupts(); + + /* + * Linux Kernel Parameters (passing device tree): + * 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) + epapr_magic = 0x45504150; +#else + epapr_magic = 0x65504150; +#endif + + debug (" Booting using OF flat tree...\n"); + (*kernel) (of_flat_tree, 0, 0, epapr_magic, CFG_BOOTMAPSZ, 0, 0); + /* does not return */ + + return 0; +} + +U_BOOT_CMD( + bootepapr, 3, 1, do_boot_epapr, + "bootepapr - boot according to ePAPR client interface\n", + "<entry point> <device tree address>\n" +); +#endif