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authorBecky Bruce <becky.bruce@freescale.com>2008-11-06 17:37:35 -0600
committerJon Loeliger <jdl@freescale.com>2008-11-10 10:10:05 -0600
commit3111d32c494e8251b90917447796a7206b757e1e (patch)
tree774785cc25baf8f118d2539e1d353d3ffd76afd7 /cpu/mpc86xx/start.S
parentc759a01a0022de9378a3a761f49786f87684c916 (diff)
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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/mpc86xx/start.S')
-rw-r--r--cpu/mpc86xx/start.S44
1 files changed, 33 insertions, 11 deletions
diff --git a/cpu/mpc86xx/start.S b/cpu/mpc86xx/start.S
index 0aa8a4f..efd654c 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