diff options
| author | Timur Tabi <timur@freescale.com> | 2011-08-04 18:03:41 -0500 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2011-09-29 19:01:04 -0500 |
| commit | e46fedfeb214d118b9983d11fcc929ed49f5ccd7 (patch) | |
| tree | 082992bbcb09217952f6f758ef78d74460cc2458 /include/mpc85xx.h | |
| parent | b6c3722dfa98a68236301ddf525dfaf90a95224f (diff) | |
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>
Diffstat (limited to 'include/mpc85xx.h')
| -rw-r--r-- | include/mpc85xx.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/include/mpc85xx.h b/include/mpc85xx.h index 2495b99c310..11d898527bf 100644 --- a/include/mpc85xx.h +++ b/include/mpc85xx.h @@ -26,4 +26,46 @@ #define SCCR_DFBRG10 0x00000002 /* BRGCLK division by 64 */ #define SCCR_DFBRG11 0x00000003 /* BRGCLK division by 256 */ +/* + * Define default values for some CCSR macros to make header files cleaner* + * + * To completely disable CCSR relocation in a board header file, define + * CONFIG_SYS_CCSR_DO_NOT_RELOCATE. This will force CONFIG_SYS_CCSRBAR_PHYS + * to a value that is the same as CONFIG_SYS_CCSRBAR. + */ + +#ifdef CONFIG_SYS_CCSRBAR_PHYS +#error "Do not define CONFIG_SYS_CCSRBAR_PHYS directly. Use \ +CONFIG_SYS_CCSRBAR_PHYS_LOW and/or CONFIG_SYS_CCSRBAR_PHYS_HIGH instead." +#endif + +#ifdef CONFIG_SYS_CCSR_DO_NOT_RELOCATE +#undef CONFIG_SYS_CCSRBAR_PHYS_HIGH +#undef CONFIG_SYS_CCSRBAR_PHYS_LOW +#define CONFIG_SYS_CCSRBAR_PHYS_HIGH 0 +#endif + +#ifndef CONFIG_SYS_CCSRBAR +#define CONFIG_SYS_CCSRBAR CONFIG_SYS_CCSRBAR_DEFAULT +#endif + +#ifndef CONFIG_SYS_CCSRBAR_PHYS_HIGH +#ifdef CONFIG_PHYS_64BIT +#define CONFIG_SYS_CCSRBAR_PHYS_HIGH 0xf +#else +#define CONFIG_SYS_CCSRBAR_PHYS_HIGH 0 +#endif +#endif + +#ifndef CONFIG_SYS_CCSRBAR_PHYS_LOW +#define CONFIG_SYS_CCSRBAR_PHYS_LOW CONFIG_SYS_CCSRBAR_DEFAULT +#endif + +#define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH * 1ull) << 32 | \ + CONFIG_SYS_CCSRBAR_PHYS_LOW) + +#ifndef CONFIG_SYS_IMMR +#define CONFIG_SYS_IMMR CONFIG_SYS_CCSRBAR +#endif + #endif /* __MPC85xx_H__ */ |