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powerpc/85xx: Move INIT_RAM_ADDR physical address to 36-bit space

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If 36-bit physical address is used, move the INIT_RAM_ADDR to higher
address. This frees the low 4GB address space for better use.

Signed-off-by: York Sun <yorksun@freescale.com>
This commit is contained in:
york 2010-07-02 22:25:57 +00:00 • committed by Kumar Gala
parent ebd7cb0ba9
commit a3f18529ec
1 changed files with 10 additions and 0 deletions
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10
arch/powerpc/cpu/mpc85xx/start.S
View file

@ -330,8 +330,18 @@ _start_e500:
lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@h lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@h
ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@l ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@l
#if defined(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW) && \
defined(CONFIG_SYS_INIT_RAM_ADDR_PHYS_HIGH)
lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW, 0,
(MAS3_SX|MAS3_SW|MAS3_SR))@h
ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW, 0,
(MAS3_SX|MAS3_SW|MAS3_SR))@l
li r10,CONFIG_SYS_INIT_RAM_ADDR_PHYS_HIGH
mtspr MAS7,r10
#else
lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h
ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l
#endif
mtspr MAS0,r6 mtspr MAS0,r6
mtspr MAS1,r7 mtspr MAS1,r7