powerpc/85xx: introduce and document CONFIG_SYS_CCSRBAR macros
Introduce the CONFIG_SYS_CCSRBAR_PHYS_HIGH and CONFIG_SYS_CCSRBAR_PHYS_LOW
macros, which contain the high and low portions of CONFIG_SYS_CCSRBAR_PHYS.
This is necessary for the assembly-language code that relocates CCSR, since
the assembler does not understand 64-bit constants.
CONFIG_SYS_CCSRBAR_PHYS is automatically defined from the
CONFIG_SYS_CCSRBAR_PHYS_HIGH and CONFIG_SYS_CCSRBAR_PHYS_LOW macros, so it
should not be defined in a board header file. Similarly,
CONFIG_SYS_CCSRBAR_DEFAULT is defined for each SOC in config_mpc85xx.h, so
it should also not be defined in the board header file.
CONFIG_SYS_CCSR_DO_NOT_RELOCATE is a "short-cut" macro that guarantees that
CONFIG_SYS_CCSRBAR_PHYS is set to the same value as CONFIG_SYS_CCSRBAR_DEFAULT,
and so CCSR will not be relocated.
Since CONFIG_SYS_CCSRBAR_DEFAULT is locked to a fixed value, multi-stage U-Boot
builds (e.g. NAND) are required to relocate CCSR only during the last stage
(i.e. the "real" U-Boot). All other stages should define
CONFIG_SYS_CCSR_DO_NOT_RELOCATE to ensure that CCSR is not relocated.
README is updated with descriptions of all the CONFIG_SYS_CCSRBAR_xxx macros.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/include/configs/MPC8569MDS.h b/include/configs/MPC8569MDS.h
index fa626bb..dd7278c 100644
--- a/include/configs/MPC8569MDS.h
+++ b/include/configs/MPC8569MDS.h
@@ -105,20 +105,11 @@
#define CONFIG_SYS_L2_SIZE (512 << 10)
#define CONFIG_SYS_INIT_L2_END (CONFIG_SYS_INIT_L2_ADDR + CONFIG_SYS_L2_SIZE)
-/*
- * Base addresses -- Note these are effective addresses where the
- * actual resources get mapped (not physical addresses)
- */
-#define CONFIG_SYS_CCSRBAR 0xe0000000 /* relocated CCSRBAR */
-#define CONFIG_SYS_CCSRBAR_PHYS CONFIG_SYS_CCSRBAR
- /* physical addr of CCSRBAR */
-#define CONFIG_SYS_IMMR CONFIG_SYS_CCSRBAR
- /* PQII uses CONFIG_SYS_IMMR */
+#define CONFIG_SYS_CCSRBAR 0xe0000000
+#define CONFIG_SYS_CCSRBAR_PHYS_LOW CONFIG_SYS_CCSRBAR
#if defined(CONFIG_RAMBOOT_NAND) && !defined(CONFIG_NAND_SPL)
-#define CONFIG_SYS_CCSRBAR_DEFAULT CONFIG_SYS_CCSRBAR
-#else
-#define CONFIG_SYS_CCSRBAR_DEFAULT 0xff700000 /* CCSRBAR Default */
+#define CONFIG_SYS_CCSR_DO_NOT_RELOCATE
#endif
/* DDR Setup */