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lmb: x86: Add arch_lmb_reserve()

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Add arch_lmb_reserve() implemented using arch_lmb_reserve_generic().
It is rather likely this architecture also needs to cover U-Boot with
LMB before booting Linux.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Cc: Tom Rini <trini@konsulko.com>
This commit is contained in:
Marek Vasut 2021-09-10 22:47:18 +02:00 • committed by Tom Rini
parent 7996b7e9f5
commit a69753f31d
1 changed files with 18 additions and 0 deletions
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18
arch/x86/lib/bootm.c
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@ -223,3 +223,21 @@ int do_bootm_linux(int flag, int argc, char *const argv[],
return boot_jump_linux(images);
}
static ulong get_sp(void)
{
ulong ret;
#if CONFIG_IS_ENABLED(X86_64)
ret = gd->start_addr_sp;
#else
asm("mov %%esp, %0" : "=r"(ret) : );
#endif
return ret;
}
void arch_lmb_reserve(struct lmb *lmb)
{
arch_lmb_reserve_generic(lmb, get_sp(), gd->ram_top, 4096);
}