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| author | Becky Bruce <becky.bruce@freescale.com> | 2008-11-06 17:37:35 -0600 |
|---|---|---|
| committer | Jon Loeliger <jdl@freescale.com> | 2008-11-10 10:10:05 -0600 |
| commit | 3111d32c494e8251b90917447796a7206b757e1e (patch) | |
| tree | 774785cc25baf8f118d2539e1d353d3ffd76afd7 /cpu | |
| parent | c759a01a0022de9378a3a761f49786f87684c916 (diff) | |
| download | blackbird-obmc-uboot-3111d32c494e8251b90917447796a7206b757e1e.tar.gz blackbird-obmc-uboot-3111d32c494e8251b90917447796a7206b757e1e.zip | |
mpc8641: Support 36-bit physical addressing
This patch creates a memory map with all the devices
in 36-bit physical space, in addition to the 32-bit map.
The CCSR relocation is moved (again, sorry) to
allow for the physical address to be 36 bits - this
requires translation to be enabled. With 36-bit physical
addressing enabled, we are no longer running with VA=PA
translations. This means we have to distinguish between
the two in the config file. The existing region name is
used to indicate the virtual address, and a _PHYS variety
is created to represent the physical address.
Large physical addressing is not enabled by default.
Set CONFIG_PHYS_64BIT in the config file to turn this on.
Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Diffstat (limited to 'cpu')
| -rw-r--r-- | cpu/mpc86xx/start.S | 44 |
1 files changed, 33 insertions, 11 deletions
diff --git a/cpu/mpc86xx/start.S b/cpu/mpc86xx/start.S index 0aa8a4feaa..efd654ce76 100644 --- a/cpu/mpc86xx/start.S +++ b/cpu/mpc86xx/start.S @@ -209,11 +209,6 @@ boot_warm: sync #endif -#if (CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR) - /* setup ccsrbar now while we're in real mode */ - bl setup_ccsrbar -#endif - /* * Calculate absolute address in FLASH and jump there *------------------------------------------------------*/ @@ -267,6 +262,10 @@ addr_trans_enabled: sync #endif +#if (CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR) + bl setup_ccsrbar +#endif + /* set up the stack pointer in our newly created * cache-ram (r1) */ lis r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@h @@ -414,6 +413,26 @@ early_bats: mtspr DBAT6L, r4 mtspr DBAT6U, r3 isync + +#if(CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR) + /* IBAT 7 */ + lis r4, CONFIG_SYS_CCSR_DEFAULT_IBATL@h + ori r4, r4, CONFIG_SYS_CCSR_DEFAULT_IBATL@l + lis r3, CONFIG_SYS_CCSR_DEFAULT_IBATU@h + ori r3, r3, CONFIG_SYS_CCSR_DEFAULT_IBATU@l + mtspr IBAT7L, r4 + mtspr IBAT7U, r3 + isync + + /* DBAT 7 */ + lis r4, CONFIG_SYS_CCSR_DEFAULT_DBATL@h + ori r4, r4, CONFIG_SYS_CCSR_DEFAULT_DBATL@l + lis r3, CONFIG_SYS_CCSR_DEFAULT_DBATU@h + ori r3, r3, CONFIG_SYS_CCSR_DEFAULT_DBATU@l + mtspr DBAT7L, r4 + mtspr DBAT7U, r3 + isync +#endif blr .globl clear_tlbs @@ -860,17 +879,20 @@ setup_ccsrbar: lis r4, CONFIG_SYS_CCSRBAR_DEFAULT@h ori r4, r4, CONFIG_SYS_CCSRBAR_DEFAULT@l - lis r5, CONFIG_SYS_CCSRBAR@h - ori r5, r5, CONFIG_SYS_CCSRBAR@l - srwi r6,r5,12 - stw r6, 0(r4) + lis r5, CONFIG_SYS_CCSRBAR_PHYS_LOW@h + ori r5, r5, CONFIG_SYS_CCSRBAR_PHYS_LOW@l + srwi r5,r5,12 + li r6, CONFIG_SYS_CCSRBAR_PHYS_HIGH@l + rlwimi r5,r6,20,8,11 + stw r5, 0(r4) /* Store physical value of CCSR */ isync - lis r5, 0xffff - ori r5,r5,0xf000 + lis r5, TEXT_BASE@h + ori r5,r5,TEXT_BASE@l lwz r5, 0(r5) isync + /* Use VA of CCSR to do read */ lis r3, CONFIG_SYS_CCSRBAR@h lwz r5, CONFIG_SYS_CCSRBAR@l(r3) isync |
