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spl: Enforce framebuffer reservation from end of RAM

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Add an API which enforces framebuffer reservation from end of RAM.
This is done so that next stage can directly skip this region before
carrying out further reservations.

Signed-off-by: Devarsh Thakkar <devarsht@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Devarsh Thakkar 2023-12-05 21:25:16 +05:30 committed by Tom Rini
parent 52a86e69e2
commit 1d3c266758
2 changed files with 29 additions and 0 deletions
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19
common/spl/spl.c
View file

@ -42,6 +42,7 @@
#include <fdt_support.h>
#include <bootcount.h>
#include <wdt.h>
#include <video.h>
DECLARE_GLOBAL_DATA_PTR;
DECLARE_BINMAN_MAGIC_SYM;
@ -152,6 +153,24 @@ void spl_fixup_fdt(void *fdt_blob)
#endif
}
int spl_reserve_video_from_ram_top(void)
{
if (CONFIG_IS_ENABLED(VIDEO)) {
ulong addr;
int ret;
addr = gd->ram_top;
ret = video_reserve(&addr);
if (ret)
return ret;
debug("Reserving %luk for video at: %08lx\n",
((unsigned long)gd->relocaddr - addr) >> 10, addr);
gd->relocaddr = addr;
}
return 0;
}
ulong spl_get_image_pos(void)
{
if (!CONFIG_IS_ENABLED(BINMAN_UBOOT_SYMBOLS))

10
include/spl.h
View file

@ -889,6 +889,16 @@ int spl_usb_load(struct spl_image_info *spl_image,
int spl_ymodem_load_image(struct spl_image_info *spl_image,
struct spl_boot_device *bootdev);
/**
* spl_reserve_video_from_ram_top() - Reserve framebuffer memory from end of RAM
*
* This enforces framebuffer reservation at SPL stage from end of RAM so that
* next stage can directly skip this pre-reserved area before carrying out
* further reservations. The allocation address is stored in struct video_uc_plat.
*
* Return: 0 on success, otherwise error code
*/
int spl_reserve_video_from_ram_top(void);
/**
* spl_invoke_atf - boot using an ARM trusted firmware image