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boot: fdt: Perform arch_fixup_fdt() on the given device tree for falcon boot

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In single stage bootmode or falcon boot mode, the SPL shall update the
device tree that we load with the normal fixups done via
arch_fixup_fdt(), when possible (ie we have enough information in this
restricted environment to be able to do that still).  This will include
for example updating them memory nodes.

Signed-off-by: Ravi Babu <ravibabu@ti.com>
[trini: Reword commit message]
This commit is contained in:
B, Ravi 2017-04-18 17:27:27 +05:30 committed by Tom Rini
parent 984a3c8777
commit 6e7585bb64
1 changed files with 40 additions and 0 deletions
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40
common/spl/spl.c
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@ -17,6 +17,7 @@
#include <malloc.h>
#include <dm/root.h>
#include <linux/compiler.h>
#include <fdt_support.h>
DECLARE_GLOBAL_DATA_PTR;
@ -56,6 +57,14 @@ __weak int spl_start_uboot(void)
return 1;
}
/* weak default platform specific function to initialize
* dram banks
*/
__weak int dram_init_banksize(void)
{
return 0;
}
/*
* Weak default function for arch specific zImage check. Return zero
* and fill start and end address if image is recognized.
@ -66,6 +75,33 @@ int __weak bootz_setup(ulong image, ulong *start, ulong *end)
}
#endif
void spl_fixup_fdt(void)
{
#if defined(CONFIG_SPL_OF_LIBFDT) && defined(CONFIG_SYS_SPL_ARGS_ADDR)
void *fdt_blob = (void *)CONFIG_SYS_SPL_ARGS_ADDR;
int err;
err = fdt_check_header(fdt_blob);
if (err < 0) {
printf("fdt_root: %s\n", fdt_strerror(err));
return;
}
/* fixup the memory dt node */
err = fdt_shrink_to_minimum(fdt_blob, 0);
if (err == 0) {
printf("spl: fdt_shrink_to_minimum err - %d\n", err);
return;
}
err = arch_fixup_fdt(fdt_blob);
if (err) {
printf("spl: arch_fixup_fdt err - %d\n", err);
return;
}
#endif
}
/*
* Weak default function for board specific cleanup/preparation before
* Linux boot. Some boards/platforms might not need it, so just provide
@ -323,6 +359,9 @@ void board_init_r(gd_t *dummy1, ulong dummy2)
debug(">>spl:board_init_r()\n");
gd->bd = &bdata;
#ifdef CONFIG_SPL_OS_BOOT
dram_init_banksize();
#endif
#if defined(CONFIG_SYS_SPL_MALLOC_START)
mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
@ -364,6 +403,7 @@ void board_init_r(gd_t *dummy1, ulong dummy2)
#ifdef CONFIG_SPL_OS_BOOT
case IH_OS_LINUX:
debug("Jumping to Linux\n");
spl_fixup_fdt();
spl_board_prepare_for_linux();
jump_to_image_linux(&spl_image);
#endif