[PATCH v3] lmb: Reserve U-Boot separately if relocation is disabled

* [PATCH v3] lmb: Reserve U-Boot separately if relocation is disabled
@ 2021-11-13 17:34 marek.vasut
  2021-11-18 23:26 ` Tom Rini
  0 siblings, 1 reply; 2+ messages in thread
From: marek.vasut @ 2021-11-13 17:34 UTC (permalink / raw)
  To: u-boot; +Cc: Marek Vasut, Simon Glass, Tom Rini

From: Marek Vasut <marek.vasut+renesas@gmail.com>

In case U-Boot starts with GD_FLG_SKIP_RELOC, the U-Boot code is
not relocated, however the stack and heap is at the end of DRAM
after relocation. Reserve a LMB area for the non-relocated U-Boot
code so it won't be overwritten.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
---
V2: Make this fully generic
V3: Cast _start to uintptr_t first
---
 lib/lmb.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/lmb.c b/lib/lmb.c
index 676b3a0bda..f72996a424 100644
--- a/lib/lmb.c
+++ b/lib/lmb.c
@@ -13,6 +13,7 @@
 #include <malloc.h>
 
 #include <asm/global_data.h>
+#include <asm/sections.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -144,6 +145,10 @@ void arch_lmb_reserve_generic(struct lmb *lmb, ulong sp, ulong end, ulong align)
 			bank_end = end - 1;
 
 		lmb_reserve(lmb, sp, bank_end - sp + 1);
+
+		if (gd->flags & GD_FLG_SKIP_RELOC)
+			lmb_reserve(lmb, (phys_addr_t)(uintptr_t)_start, gd->mon_len);
+
 		break;
 	}
 }
-- 
2.33.0


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