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spl: Add support for passing handoff info to U-Boot proper

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There is some basic informaton that SPL normally wants to pass through to
U-Boot, such as the SDRAM size and bank information.

Mkae use of the new bloblist structure for this. Add a new 'handoff' blob
which is set up in SPL and passed to U-Boot proper. Also adda  test for
sandbox_spl that checks that this works correctly and a new 'sb' command
to show the information passed from SPL.

Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2018-11-15 18:44:09 -07:00
committed by Tom Rini
parent 27028f186d
commit b0edea3c27
14 changed files with 253 additions and 17 deletions
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1
common/init/Makefile
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@@ -5,3 +5,4 @@
#
obj-y += board_init.o
obj-$(CONFIG_$(SPL_TPL_)HANDOFF) += handoff.o

47
common/init/handoff.c Normal file
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@@ -0,0 +1,47 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Passing basic information from SPL to U-Boot proper
*
* Copyright 2018 Google, Inc
*/
#include <common.h>
#include <handoff.h>
DECLARE_GLOBAL_DATA_PTR;
void handoff_save_dram(struct spl_handoff *ho)
{
ho->ram_size = gd->ram_size;
#ifdef CONFIG_NR_DRAM_BANKS
{
struct bd_info *bd = gd->bd;
int i;
for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
ho->ram_bank[i].start = bd->bi_dram[i].start;
ho->ram_bank[i].size = bd->bi_dram[i].size;
}
}
#endif
}
void handoff_load_dram_size(struct spl_handoff *ho)
{
gd->ram_size = ho->ram_size;
}
void handoff_load_dram_banks(struct spl_handoff *ho)
{
#ifdef CONFIG_NR_DRAM_BANKS
{
struct bd_info *bd = gd->bd;
int i;
for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
bd->bi_dram[i].start = ho->ram_bank[i].start;
bd->bi_dram[i].size = ho->ram_bank[i].size;
}
}
#endif
}