diff options
| author | Alexandru Gagniuc <mr.nuke.me@gmail.com> | 2013-12-22 18:51:29 -0500 |
|---|---|---|
| committer | Alexandru Gagniuc <mr.nuke.me@gmail.com> | 2014-01-08 23:02:49 +0100 |
| commit | be32f51aa180bd132caa790452b8c0e7920c3afb (patch) | |
| tree | 6e40d4892946d277f422bc1f4f0bc25a4253defa /src/cpu/allwinner/a10/Kconfig | |
| parent | 14964dd3726971e47c2df6eff49d23a62e07963b (diff) | |
cpu/allwinner/a10: Clarify the usage of SRAM during bootblock
We have 32KiB of usable SRAM right when we boot. The first 24KiB can
be loaded with our bootblock, while the other 8KiB can be used as
stack during the bootblock stage.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Change-Id: I48d3a37869031c3c1dbc1fab71204d473d64deeb
Reviewed-on: http://review.coreboot.org/4563
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/cpu/allwinner/a10/Kconfig')
| -rw-r--r-- | src/cpu/allwinner/a10/Kconfig | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/src/cpu/allwinner/a10/Kconfig b/src/cpu/allwinner/a10/Kconfig index 639108a5ba..3df1cebdfc 100644 --- a/src/cpu/allwinner/a10/Kconfig +++ b/src/cpu/allwinner/a10/Kconfig @@ -42,18 +42,22 @@ config ROMSTAGE_BASE hex default SYS_SDRAM_BASE -# Keep the stack in SRAM +# Keep the stack in SRAM block A2. +# SRAM blocks A1 (0-16KiB) and A2 (16KiB-32KiB) are always accessible to the +# CPU. This gives us 32KiB of SRAM to boot with. The BROM bootloader will use up +# to 24KiB to load our bootblock, which leaves us the area from 24KiB to 32KiB +# to use however we see fit. config STACK_TOP hex default 0x00008000 config STACK_BOTTOM hex - default 0x00004000 + default 0x00006000 config STACK_SIZE hex - default 0x00004000 + default 0x00002000 ## TODO Change this to some better address not overlapping bootblock when ## cbfstool supports creating header in arbitrary location. |