astbmc: Allow loading of payload from flash

To date BMC platforms have had their payload built in to the skiboot
binary. This patch adds the option of loading from a flash partition
instead.

This has been tested on palmetto with a separate skiboot and
kernel+rootfs partition. In the future we may have separate kernel and
rootfs, which should just work. For now this is what we see when booting:

  [10648940943,5] INIT: Kernel loaded, size: 15728640 bytes (0 = unknown
  preload)
  [10649094578,5] INIT: 32-bit kernel entry at 0x2001015c
  [10649170607,3] PLAT: No ROOTFS partition in PNOR

If the partition named cannot be found, the core loading logic will fall
back to using the built-in payload. In this case, the user gets the
following messages:

  [2214557191,3] PLAT: No KERNEL partition in PNOR.
  [2220486159,5] INIT: platform kernel load failed.
  [2221293286,5] Using built-in kernel.
  [2265861935,5] INIT: Kernel loaded, size: 14706638 bytes (0 = unknown
  preload).

Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/platforms/astbmc/habanero.c b/platforms/astbmc/habanero.c
index d442d1f..a19aafd 100644
--- a/platforms/astbmc/habanero.c
+++ b/platforms/astbmc/habanero.c
@@ -49,4 +49,5 @@ DECLARE_PLATFORM(habanero) = {
 	.external_irq		= astbmc_ext_irq,
 	.cec_power_down         = astbmc_ipmi_power_down,
 	.cec_reboot             = astbmc_ipmi_reboot,
+	.load_resource		= pnor_load_resource,
 };