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ARMv7-A: Conditionally compile out more unneeded logic when .data and .bss are in SDRAM

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This commit is contained in:
Gregory Nutt
2014-01-28 16:39:08 -06:00
parent 72ee80b7cc
commit 3ddb0ebaef
1 changed files with 2 additions and 11 deletions
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arch/arm/src/armv7-a/arm_head.S
+2 -11
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@@ -278,22 +278,13 @@ __start:
add r1, r1, #(1024*1024) /* R1: Increment the physical address */ add r1, r1, #(1024*1024) /* R1: Increment the physical address */
bne .Lpgtextloop /* Loop while R4 is non-zero */ bne .Lpgtextloop /* Loop while R4 is non-zero */
#ifdef CONFIG_BOOT_RUNFROMFLASH #if defined(CONFIG_BOOT_RUNFROMFLASH) && !defined(CONFIG_BOOT_SDRAM_DATA)
/* If we are executing from FLASH, then we will need additional mappings for /* If we are executing from FLASH, then we will need additional mappings for
* the primary RAM region that holds the .data, .bss, stack, and heap memory. * the primary RAM region that holds the .data, .bss, stack, and heap memory.
* *
* Here we expect to have: * Here we expect to have:
* r5 = Address of the base of the L1 table * r5 = Address of the base of the L1 table
* *
* REVISIT: We might need this second mapping under certain conditions
* when executing from RAM too. When the RAM region is larger than 1MB
* and the page table is in the high end of RAM, then the single mapping
* above will not be sufficient.
*
* REVISIT: If the page table is not located in the primary RAM regions,
* then we will also need an additional map the page table if the page
* table resides in internal SRAM.
*
* Load information needed to map the .text region. After the ldmia, we * Load information needed to map the .text region. After the ldmia, we
* will have: * will have:
* *
@@ -319,7 +310,7 @@ __start:
add r1, r1, #(1024*1024) /* R1: Increment the physical address */ add r1, r1, #(1024*1024) /* R1: Increment the physical address */
bne .Lpgramloop /* Loop while R4 is non-zero */ bne .Lpgramloop /* Loop while R4 is non-zero */
#endif /* CONFIG_BOOT_RUNFROMFLASH */ #endif /* CONFIG_BOOT_RUNFROMFLASH && !CONFIG_BOOT_SDRAM_DATA */
#endif /* CONFIG_ARCH_ROMPGTABLE */ #endif /* CONFIG_ARCH_ROMPGTABLE */
/* The following logic will set up the ARMv7-A for normal operation. /* The following logic will set up the ARMv7-A for normal operation.