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[U-Boot,RFC,05/36] x86 - Paramatize link locations

Message ID 1294084016-2674-6-git-send-email-graeme.russ@gmail.com
State Superseded
Delegated to: Graeme Russ
Headers show

Commit Message

Graeme Russ Jan. 3, 2011, 7:46 p.m. UTC 
---
 arch/i386/cpu/config.mk  |    6 ++++++
 arch/i386/cpu/u-boot.lds |   22 +++++++---------------
 board/eNET/config.mk     |    1 +
 3 files changed, 14 insertions(+), 15 deletions(-)

--
1.7.1.422.g049e9
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Patch

diff --git a/arch/i386/cpu/config.mk b/arch/i386/cpu/config.mk
index 99edacf..83ce73c 100644
--- a/arch/i386/cpu/config.mk
+++ b/arch/i386/cpu/config.mk
@@ -25,3 +25,9 @@  CROSS_COMPILE ?= i386-linux-

 PLATFORM_CPPFLAGS += -DCONFIG_I386 -D__I386__
 PLATFORM_CPPFLAGS += -march=i386 -Werror
+
+# DO NOT MODIFY THE FOLLOWING UNLESS YOU REALLY KNOW WHAT YOU ARE DOING!
+LDPPFLAGS += -DRESET_SEG_START=0xffff0000
+LDPPFLAGS += -DRESET_SEG_SIZE=0x10000
+LDPPFLAGS += -DRESET_VEC_LOC=0xfff0
+LDPPFLAGS += -DSTART_16=0xf800
diff --git a/arch/i386/cpu/u-boot.lds b/arch/i386/cpu/u-boot.lds
index 3eeb2a2..e712d26 100644
--- a/arch/i386/cpu/u-boot.lds
+++ b/arch/i386/cpu/u-boot.lds
@@ -84,21 +84,13 @@  SECTIONS
 	__bios_start = LOADADDR(.bios);
 	__bios_size = SIZEOF(.bios);

-	/* The load addresses below assumes that the flash
-	 * will be mapped so that 0x387f0000 == 0xffff0000
-	 * at reset time
-	 *
-	 * The fe00 and ff00 offsets of the start32 and start16
-	 * segments are arbitrary, the just have to be mapped
-	 * at reset and the code have to fit.
-	 * The fff0 offset of resetvec is important, however.
+	/*
+	 * The following expressions place the 16-bit Real-Mode code and
+	 * Reset Vector at the end of the Flash ROM
 	 */
-	. = 0xfffffe00;
-	.start32 : AT (CONFIG_SYS_TEXT_BASE + 0x3fe00) { KEEP(*(.start32)); }
+	. = START_16;
+	.start16 : AT (CONFIG_SYS_TEXT_BASE + (FLASH_SIZE - RESET_SEG_SIZE + START_16)) { KEEP(*(.start16)); }

-	. = 0xf800;
-	.start16 : AT (CONFIG_SYS_TEXT_BASE + 0x3f800) { KEEP(*(.start16)); }
-
-	. = 0xfff0;
-	.resetvec : AT (CONFIG_SYS_TEXT_BASE + 0x3fff0) { KEEP(*(.resetvec)); }
+	. = RESET_VEC_LOC;
+	.resetvec : AT (CONFIG_SYS_TEXT_BASE + (FLASH_SIZE - RESET_SEG_SIZE + RESET_VEC_LOC)) { KEEP(*(.resetvec)); }
 }
diff --git a/board/eNET/config.mk b/board/eNET/config.mk
index 02e4147..4e066b4 100644
--- a/board/eNET/config.mk
+++ b/board/eNET/config.mk
@@ -23,3 +23,4 @@ 

 CONFIG_SYS_TEXT_BASE = 0x06000000
 CFLAGS_common/dlmalloc.o += -Wa,--no-warn -fno-strict-aliasing
+LDPPFLAGS += -DFLASH_SIZE=0x40000