soc/amd/picasso: Add custom memlayout.ld file

This change copies src/arch/x86/memlayout.ld file to
src/soc/amd/picasso/ and sets MEMLAYOUT_LD_FILE config variable to
point to this newly added file. Unused elements from the memlayout.ld
file are dropped and path to early_dram.ld is updated to include the
one from src/arch/x86.

BUG=b:155322763

Signed-off-by: Furquan Shaikh <furquan@google.com>
Change-Id: I59bf5f93b712407ddcc9fb8a46167936c6c28a76
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42261
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/amd/picasso/Kconfig

@@ -56,6 +56,10 @@ config CPU_SPECIFIC_OPTIONS
 	select HAVE_CF9_RESET
 	select SUPPORT_CPU_UCODE_IN_CBFS
 
+config MEMLAYOUT_LD_FILE
+	string
+	default "src/soc/amd/picasso/memlayout.ld"
+
 config PRERAM_CBMEM_CONSOLE_SIZE
 	hex
 	default 0x1600

src/soc/amd/picasso/memlayout.ld

@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <memlayout.h>
+#include <arch/header.ld>
+
+#define EARLY_MEMLAYOUT	"src/arch/x86/early_ram.ld"
+
+SECTIONS
+{
+	/*
+	 * It would be good to lay down RAMSTAGE, ROMSTAGE, etc consecutively
+	 * like other architectures/chipsets it's not possible because of
+	 * the linking games played during romstage creation by trying
+	 * to find the final landing place in CBFS for XIP. Therefore,
+	 * conditionalize with macros.
+	 */
+#if ENV_RAMSTAGE
+	RAMSTAGE(CONFIG_RAMBASE, (CONFIG(RELOCATABLE_RAMSTAGE) ? 8M :
+					CONFIG_RAMTOP - CONFIG_RAMBASE))
+
+#elif ENV_ROMSTAGE
+	/* The 1M size is not allocated. It's just for basic size checking.
+	 * Link at 32MiB address and rely on cbfstool to relocate to XIP. */
+	ROMSTAGE(CONFIG_ROMSTAGE_ADDR, 1M)
+
+	#include EARLY_MEMLAYOUT
+#elif ENV_SEPARATE_VERSTAGE
+	/* The 1M size is not allocated. It's just for basic size checking.
+	 * Link at 32MiB address and rely on cbfstool to relocate to XIP. */
+	VERSTAGE(CONFIG_VERSTAGE_ADDR, 1M)
+
+	#include EARLY_MEMLAYOUT
+#elif ENV_BOOTBLOCK
+	BOOTBLOCK(CONFIG_X86_RESET_VECTOR - CONFIG_C_ENV_BOOTBLOCK_SIZE + 0x10,
+			CONFIG_C_ENV_BOOTBLOCK_SIZE)
+
+	#include EARLY_MEMLAYOUT
+#endif
+}
+
+#if ENV_BOOTBLOCK
+/* Bootblock specific scripts which provide more SECTION directives. */
+#include <cpu/x86/16bit/entry16.ld>
+#include <cpu/x86/16bit/reset16.ld>
+#endif  /* ENV_BOOTBLOCK */