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microblaze: Expand and correct configuration comments 

- fix CONFIG_SYS_MALLOC_BASE from 0x11FB_F000 to 0x13EF_F000
  - add new size calculation for CONFIG_SYS_MONITOR_LEN
    and CONFIG_SYS_MALLOC_LEN derived from SIZE
  - change CONFIG_SYS_MONITOR_BASE and CONFIG_SYS_MALLOC_BASE
    calculation to a symbolic equation with the corresponding
    _LEN definitions
  - add a "CFI flash memory layout - Example" comment

Signed-off-by: Stephan Linz <linz@li-pro.net>
This commit is contained in:
Stephan Linz 2012-07-01 16:44:37 +02:00 committed by Michal Simek
parent 7cfb13a7f4
commit 8f371b1850
1 changed files with 29 additions and 7 deletions
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36
include/configs/microblaze-generic.h
View File

@ -122,15 +122,19 @@
/*
* memory layout - Example
* CONFIG_SYS_TEXT_BASE = 0x1200_0000;
* CONFIG_SYS_TEXT_BASE = 0x1200_0000; defined in config.mk
* CONFIG_SYS_SRAM_BASE = 0x1000_0000;
* CONFIG_SYS_SRAM_SIZE = 0x0400_0000;
* CONFIG_SYS_SRAM_SIZE = 0x0400_0000; 64MB
*
* CONFIG_SYS_MONITOR_LEN = 0x40000
* CONFIG_SYS_MALLOC_LEN = 3 * CONFIG_SYS_MONITOR_LEN = 0xC0000
*
* CONFIG_SYS_GBL_DATA_OFFSET = 0x1000_0000 + 0x0400_0000 - 0x1000 = 0x13FF_F000
* CONFIG_SYS_MONITOR_BASE = 0x13FF_F000 - 0x40000 = 0x13FB_F000
* CONFIG_SYS_MALLOC_BASE = 0x13FB_F000 - 0x40000 = 0x13F7_F000
* CONFIG_SYS_MONITOR_BASE = 0x13FF_F000 - CONFIG_SYS_MONITOR_LEN = 0x13FB_F000
* CONFIG_SYS_MALLOC_BASE = 0x13FB_F000 - CONFIG_SYS_MALLOC_LEN = 0x13EF_F000
*
* 0x1000_0000 CONFIG_SYS_SDRAM_BASE
* MEMTEST_AREA 64kB
* FREE
* 0x1200_0000 CONFIG_SYS_TEXT_BASE
* U-BOOT code
@ -138,9 +142,9 @@
* FREE
*
* STACK
* 0x13F7_F000 CONFIG_SYS_MALLOC_BASE
* MALLOC_AREA 256kB Alloc
* 0x11FB_F000 CONFIG_SYS_MONITOR_BASE
* 0x13EF_F000 CONFIG_SYS_MALLOC_BASE
* MALLOC_AREA 768kB Alloc
* 0x13FB_F000 CONFIG_SYS_MONITOR_BASE
* MONITOR_CODE 256kB Env
* 0x13FF_F000 CONFIG_SYS_GBL_DATA_OFFSET
* GLOBAL_DATA 4kB bd, gd
@ -173,6 +177,24 @@
/* stack */
#define CONFIG_SYS_INIT_SP_OFFSET CONFIG_SYS_MALLOC_BASE
/*
* CFI flash memory layout - Example
* CONFIG_SYS_FLASH_BASE = 0x2200_0000;
* CONFIG_SYS_FLASH_SIZE = 0x0080_0000; 8MB
*
* SECT_SIZE = 0x20000; 128kB is one sector
* CONFIG_ENV_SIZE = SECT_SIZE; 128kB environment store
*
* 0x2200_0000 CONFIG_SYS_FLASH_BASE
* FREE 256kB
* 0x2204_0000 CONFIG_ENV_ADDR
* ENV_AREA 128kB
* 0x2206_0000
* FREE
* 0x2280_0000 CONFIG_SYS_FLASH_BASE + CONFIG_SYS_FLASH_SIZE
*
*/
#ifdef FLASH
# define CONFIG_SYS_FLASH_BASE XILINX_FLASH_START
# define CONFIG_SYS_FLASH_SIZE XILINX_FLASH_SIZE