[PATCH 12/14] lmb: x86: Add arch_lmb_reserve()
Marek Vasut
marek.vasut at gmail.com
Sun Aug 15 20:13:12 CEST 2021
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 at gmail.com>
Cc: Simon Glass <sjg at chromium.org>
Cc: Simon Goldschmidt <simon.k.r.goldschmidt at gmail.com>
Cc: Tom Rini <trini at konsulko.com>
---
arch/x86/lib/bootm.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/arch/x86/lib/bootm.c b/arch/x86/lib/bootm.c
index 733dd71257..667e5e689e 100644
--- a/arch/x86/lib/bootm.c
+++ b/arch/x86/lib/bootm.c
@@ -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);
+}
--
2.30.2
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