ARM: add relocation support

!! This breaks support for all arm boards !! To compile in old style, you must define CONFIG_SYS_ARM_WITHOUT_RELOC or you can compile with "CONFIG_SYS_ARM_WITHOUT_RELOC=1 ./MAKEALL board" !! This define will be removed soon, so convert your board to use relocation support Portions of this work were supported by funding from the CE Linux Forum. Signed-off-by: Heiko Schocher <[email protected]> Fix boot from NAND for non-ARM systems Signed-off-by: Wolfgang Denk <[email protected]>
imaami · Sep 19, 2010 · f1d2b31 · f1d2b31
1 parent 4fff329
commit f1d2b31
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Showing 13 changed files with 910 additions and 8 deletions.
diff --git a/arch/arm/config.mk b/arch/arm/config.mk
@@ -33,6 +33,14 @@ STANDALONE_LOAD_ADDR = 0xc100000
 endif
 endif
 
+ifndef CONFIG_SYS_ARM_WITHOUT_RELOC
+# needed for relocation
+PLATFORM_RELFLAGS += -fPIC
+endif
+
+ifdef CONFIG_SYS_ARM_WITHOUT_RELOC
+PLATFORM_CPPFLAGS += -DCONFIG_SYS_ARM_WITHOUT_RELOC
+endif
 PLATFORM_CPPFLAGS += -DCONFIG_ARM -D__ARM__
 
 # Explicitly specifiy 32-bit ARM ISA since toolchain default can be -mthumb:

diff --git a/arch/arm/include/asm/config.h b/arch/arm/include/asm/config.h
@@ -21,7 +21,8 @@
 #ifndef _ASM_CONFIG_H_
 #define _ASM_CONFIG_H_
 
+#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
 /* Relocation to SDRAM works on all ARM boards */
 #define CONFIG_RELOC_FIXUP_WORKS
-
+#endif
 #endif
diff --git a/arch/arm/include/asm/global_data.h b/arch/arm/include/asm/global_data.h
@@ -46,6 +46,17 @@ typedef	struct	global_data {
 #endif
 #ifdef CONFIG_FSL_ESDHC
 	unsigned long	sdhc_clk;
+#endif
+#if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
+	unsigned long	relocaddr;	/* Start address of U-Boot in RAM */
+	phys_size_t	ram_size;	/* RAM size */
+	unsigned long	mon_len;	/* monitor len */
+	unsigned long	irq_sp;		/* irq stack pointer */
+	unsigned long	start_addr_sp;	/* start_addr_stackpointer */
+	unsigned long	reloc_off;
+#if !(defined(CONFIG_SYS_NO_ICACHE) && defined(CONFIG_SYS_NO_DCACHE))
+	unsigned long	tlb_addr;
+#endif
 #endif
 	void		**jt;		/* jump table */
 	char		env_buf[32];	/* buffer for getenv() before reloc. */

diff --git a/arch/arm/include/asm/u-boot-arm.h b/arch/arm/include/asm/u-boot-arm.h
@@ -30,11 +30,20 @@
 #define _U_BOOT_ARM_H_	1
 
 /* for the following variables, see start.S */
-extern ulong _armboot_start;	/* code start */
 extern ulong _bss_start;	/* code + data end == BSS start */
 extern ulong _bss_end;		/* BSS end */
 extern ulong IRQ_STACK_START;	/* top of IRQ stack */
 extern ulong FIQ_STACK_START;	/* top of FIQ stack */
+#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
+extern ulong _armboot_start;	/* code start */
+#else
+extern ulong _TEXT_BASE;	/* code start */
+extern ulong _datarel_start;
+extern ulong _datarelrolocal_start;
+extern ulong _datarellocal_start;
+extern ulong _datarelro_start;
+extern ulong IRQ_STACK_START_IN;	/* 8 bytes in IRQ stack */
+#endif
 
 /* cpu/.../cpu.c */
 int	cpu_init(void);
@@ -47,6 +56,9 @@ int	arch_misc_init(void);
 /* board/.../... */
 int	board_init(void);
 int	dram_init (void);
+#if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
+void	dram_init_banksize (void);
+#endif
 void	setup_serial_tag (struct tag **params);
 void	setup_revision_tag (struct tag **params);