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Added helper function to get CS1 base address. 

This helper function can be used for automatic
SDDR configuration based on register settings
made by a previously first stage bootloader
i.e. x-loader.

Signed-off-by: Juergen Kilb <J.Kilb@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Juergen Kilb 2011-09-09 14:10:55 +02:00 committed by Sascha Hauer
parent b9126db43f
commit 801c667d8c
2 changed files with 20 additions and 0 deletions
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1
arch/arm/mach-omap/include/mach/sys_info.h
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@ -91,6 +91,7 @@
u32 get_cpu_type(void);
u32 get_cpu_rev(void);
u32 get_sdr_cs_size(u32 offset);
u32 get_sdr_cs1_base(void);
inline u32 get_sysboot_value(void);
u32 get_gpmc0_base(void);
u32 get_base(void);

19
arch/arm/mach-omap/omap3_generic.c
View File

@ -178,7 +178,26 @@ u32 get_sdr_cs_size(u32 offset)
size *= 2 * (1024 * 1024); /* find size in MB */
return size;
}
EXPORT_SYMBOL(get_sdr_cs_size);
/**
* @brief base address of chip select 1 (cs0 is defined at 0x80000000)
*
* @return return the CS1 base address.
*/
u32 get_sdr_cs1_base(void)
{
u32 base;
u32 cs_cfg;
cs_cfg = readl(SDRC_REG(CS_CFG));
/* get ram size field */
base = (cs_cfg & 0x0000000F) << 2; /* get CS1STARTHIGH */
base = base | ((cs_cfg & 0x00000300) >> 8); /* get CS1STARTLOW */
base = base << 25;
base += 0x80000000;
return base;
}
EXPORT_SYMBOL(get_sdr_cs1_base);
/**
* @brief Get the initial SYSBOOT value
*