diff options
author | Marek Vasut <marek.vasut@gmail.com> | 2021-09-10 22:47:09 +0200 |
---|---|---|
committer | Tom Rini <trini@konsulko.com> | 2021-09-23 14:15:32 -0400 |
commit | 1274698d13ce1dfd00275b821b512e17cdc88d98 (patch) | |
tree | 76901d76d954dc1b38b2ba74afbd5a3d26b7bb0a /lib | |
parent | cfa1971977bbf2c5c4aa076924ca36f964a16a1a (diff) |
lmb: Add generic arch_lmb_reserve_generic()
The arc/arm/m68k/microblaze/mips/ppc arch_lmb_reserve() implementations
are all mostly the same, except for a couple of details. Implement a
generic arch_lmb_reserve_generic() function which can be parametrized
enough to cater for those differences between architectures. This can
also be parametrized enough so it can handle cases where U-Boot is not
relocated to the end of DRAM e.g. because there is some other reserved
memory past U-Boot (e.g. unmovable firmware for coprocessor), it is not
relocated at all, and other such use cases.
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Alexey Brodkin <alexey.brodkin@synopsys.com>
Cc: Angelo Dureghello <angelo@sysam.it>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Cc: Hai Pham <hai.pham.ud@renesas.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Cc: Tom Rini <trini@konsulko.com>
Cc: Wolfgang Denk <wd@denx.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'lib')
-rw-r--r-- | lib/lmb.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/lib/lmb.c b/lib/lmb.c index 7bd1255f7a4..793647724c3 100644 --- a/lib/lmb.c +++ b/lib/lmb.c @@ -12,6 +12,10 @@ #include <log.h> #include <malloc.h> +#include <asm/global_data.h> + +DECLARE_GLOBAL_DATA_PTR; + #define LMB_ALLOC_ANYWHERE 0 static void lmb_dump_region(struct lmb_region *rgn, char *name) @@ -113,6 +117,37 @@ void lmb_init(struct lmb *lmb) lmb->reserved.cnt = 0; } +void arch_lmb_reserve_generic(struct lmb *lmb, ulong sp, ulong end, ulong align) +{ + ulong bank_end; + int bank; + + /* + * Reserve memory from aligned address below the bottom of U-Boot stack + * until end of U-Boot area using LMB to prevent U-Boot from overwriting + * that memory. + */ + debug("## Current stack ends at 0x%08lx ", sp); + + /* adjust sp by 4K to be safe */ + sp -= align; + for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) { + if (!gd->bd->bi_dram[bank].size || + sp < gd->bd->bi_dram[bank].start) + continue; + /* Watch out for RAM at end of address space! */ + bank_end = gd->bd->bi_dram[bank].start + + gd->bd->bi_dram[bank].size - 1; + if (sp > bank_end) + continue; + if (bank_end > end) + bank_end = end - 1; + + lmb_reserve(lmb, sp, bank_end - sp + 1); + break; + } +} + static void lmb_reserve_common(struct lmb *lmb, void *fdt_blob) { arch_lmb_reserve(lmb); |