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ARM: renesas: Configure DRAM size from ATF DT fragment

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The ATF can pass additional information via the first four registers,
x0...x3. The R-Car Gen3 with mainline ATF, register x1 contains pointer
to a device tree with platform information. Parse this device tree and
extract DRAM size information from it. This is useful on systems where
the DRAM size can vary between configurations.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
This commit is contained in:
Marek Vasut 2018-10-02 20:40:58 +02:00 • committed by Marek Vasut
parent 80b44fb376
commit 175f502734
3 changed files with 72 additions and 12 deletions
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28
board/renesas/ebisu/ebisu.c
View file

@ -43,17 +43,37 @@ int board_init(void)
return 0; return 0;
} }
/*
* If the firmware passed a device tree use it for U-Boot DRAM setup.
*/
extern u64 rcar_atf_boot_args[];
int dram_init(void) int dram_init(void)
{ {
if (fdtdec_setup_mem_size_base() != 0) const void *atf_fdt_blob = (const void *)(rcar_atf_boot_args[1]);
return -EINVAL; const void *blob;
return 0; /* Check if ATF passed us DTB. If not, fall back to builtin DTB. */
if (fdt_magic(atf_fdt_blob) == FDT_MAGIC)
blob = atf_fdt_blob;
else
blob = gd->fdt_blob;
return fdtdec_setup_mem_size_base_fdt(blob);
} }
int dram_init_banksize(void) int dram_init_banksize(void)
{ {
fdtdec_setup_memory_banksize(); const void *atf_fdt_blob = (const void *)(rcar_atf_boot_args[1]);
const void *blob;
/* Check if ATF passed us DTB. If not, fall back to builtin DTB. */
if (fdt_magic(atf_fdt_blob) == FDT_MAGIC)
blob = atf_fdt_blob;
else
blob = gd->fdt_blob;
fdtdec_setup_memory_banksize_fdt(blob);
return 0; return 0;
} }

28
board/renesas/salvator-x/salvator-x.c
View file

@ -69,17 +69,37 @@ int board_init(void)
return 0; return 0;
} }
/*
* If the firmware passed a device tree use it for U-Boot DRAM setup.
*/
extern u64 rcar_atf_boot_args[];
int dram_init(void) int dram_init(void)
{ {
if (fdtdec_setup_mem_size_base() != 0) const void *atf_fdt_blob = (const void *)(rcar_atf_boot_args[1]);
return -EINVAL; const void *blob;
return 0; /* Check if ATF passed us DTB. If not, fall back to builtin DTB. */
if (fdt_magic(atf_fdt_blob) == FDT_MAGIC)
blob = atf_fdt_blob;
else
blob = gd->fdt_blob;
return fdtdec_setup_mem_size_base_fdt(blob);
} }
int dram_init_banksize(void) int dram_init_banksize(void)
{ {
fdtdec_setup_memory_banksize(); const void *atf_fdt_blob = (const void *)(rcar_atf_boot_args[1]);
const void *blob;
/* Check if ATF passed us DTB. If not, fall back to builtin DTB. */
if (fdt_magic(atf_fdt_blob) == FDT_MAGIC)
blob = atf_fdt_blob;
else
blob = gd->fdt_blob;
fdtdec_setup_memory_banksize_fdt(blob);
return 0; return 0;
} }

28
board/renesas/ulcb/ulcb.c
View file

@ -68,17 +68,37 @@ int board_init(void)
return 0; return 0;
} }
/*
* If the firmware passed a device tree use it for U-Boot DRAM setup.
*/
extern u64 rcar_atf_boot_args[];
int dram_init(void) int dram_init(void)
{ {
if (fdtdec_setup_mem_size_base() != 0) const void *atf_fdt_blob = (const void *)(rcar_atf_boot_args[1]);
return -EINVAL; const void *blob;
return 0; /* Check if ATF passed us DTB. If not, fall back to builtin DTB. */
if (fdt_magic(atf_fdt_blob) == FDT_MAGIC)
blob = atf_fdt_blob;
else
blob = gd->fdt_blob;
return fdtdec_setup_mem_size_base_fdt(blob);
} }
int dram_init_banksize(void) int dram_init_banksize(void)
{ {
fdtdec_setup_memory_banksize(); const void *atf_fdt_blob = (const void *)(rcar_atf_boot_args[1]);
const void *blob;
/* Check if ATF passed us DTB. If not, fall back to builtin DTB. */
if (fdt_magic(atf_fdt_blob) == FDT_MAGIC)
blob = atf_fdt_blob;
else
blob = gd->fdt_blob;
fdtdec_setup_memory_banksize_fdt(blob);
return 0; return 0;
} }