diff options
Diffstat (limited to 'arch/blackfin/kernel/setup.c')
| -rw-r--r-- | arch/blackfin/kernel/setup.c | 79 |
1 files changed, 41 insertions, 38 deletions
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index a58687bdee6..80447f99c2b 100644 --- a/arch/blackfin/kernel/setup.c +++ b/arch/blackfin/kernel/setup.c @@ -18,9 +18,12 @@ #include <linux/tty.h> #include <linux/pfn.h> +#ifdef CONFIG_MTD_UCLINUX +#include <linux/mtd/map.h> #include <linux/ext2_fs.h> #include <linux/cramfs_fs.h> #include <linux/romfs_fs.h> +#endif #include <asm/cplb.h> #include <asm/cacheflush.h> @@ -45,6 +48,7 @@ EXPORT_SYMBOL(_ramend); EXPORT_SYMBOL(reserved_mem_dcache_on); #ifdef CONFIG_MTD_UCLINUX +extern struct map_info uclinux_ram_map; unsigned long memory_mtd_end, memory_mtd_start, mtd_size; unsigned long _ebss; EXPORT_SYMBOL(memory_mtd_end); @@ -150,40 +154,45 @@ void __init bfin_relocate_l1_mem(void) unsigned long l1_data_b_length; unsigned long l2_length; + /* + * due to the ALIGN(4) in the arch/blackfin/kernel/vmlinux.lds.S + * we know that everything about l1 text/data is nice and aligned, + * so copy by 4 byte chunks, and don't worry about overlapping + * src/dest. + * + * We can't use the dma_memcpy functions, since they can call + * scheduler functions which might be in L1 :( and core writes + * into L1 instruction cause bad access errors, so we are stuck, + * we are required to use DMA, but can't use the common dma + * functions. We can't use memcpy either - since that might be + * going to be in the relocated L1 + */ + blackfin_dma_early_init(); + /* if necessary, copy _stext_l1 to _etext_l1 to L1 instruction SRAM */ l1_code_length = _etext_l1 - _stext_l1; - if (l1_code_length > L1_CODE_LENGTH) - panic("L1 Instruction SRAM Overflow\n"); - /* cannot complain as printk is not available as yet. - * But we can continue booting and complain later! - */ - - /* Copy _stext_l1 to _etext_l1 to L1 instruction SRAM */ - dma_memcpy(_stext_l1, _l1_lma_start, l1_code_length); + if (l1_code_length) + early_dma_memcpy(_stext_l1, _l1_lma_start, l1_code_length); + /* if necessary, copy _sdata_l1 to _sbss_l1 to L1 data bank A SRAM */ l1_data_a_length = _sbss_l1 - _sdata_l1; - if (l1_data_a_length > L1_DATA_A_LENGTH) - panic("L1 Data SRAM Bank A Overflow\n"); - - /* Copy _sdata_l1 to _sbss_l1 to L1 data bank A SRAM */ - dma_memcpy(_sdata_l1, _l1_lma_start + l1_code_length, l1_data_a_length); + if (l1_data_a_length) + early_dma_memcpy(_sdata_l1, _l1_lma_start + l1_code_length, l1_data_a_length); + /* if necessary, copy _sdata_b_l1 to _sbss_b_l1 to L1 data bank B SRAM */ l1_data_b_length = _sbss_b_l1 - _sdata_b_l1; - if (l1_data_b_length > L1_DATA_B_LENGTH) - panic("L1 Data SRAM Bank B Overflow\n"); - - /* Copy _sdata_b_l1 to _sbss_b_l1 to L1 data bank B SRAM */ - dma_memcpy(_sdata_b_l1, _l1_lma_start + l1_code_length + + if (l1_data_b_length) + early_dma_memcpy(_sdata_b_l1, _l1_lma_start + l1_code_length + l1_data_a_length, l1_data_b_length); + early_dma_memcpy_done(); + + /* if necessary, copy _stext_l2 to _edata_l2 to L2 SRAM */ if (L2_LENGTH != 0) { l2_length = _sbss_l2 - _stext_l2; - if (l2_length > L2_LENGTH) - panic("L2 SRAM Overflow\n"); - - /* Copy _stext_l2 to _edata_l2 to L2 SRAM */ - dma_memcpy(_stext_l2, _l2_lma_start, l2_length); + if (l2_length) + memcpy(_stext_l2, _l2_lma_start, l2_length); } } @@ -472,7 +481,7 @@ static __init void memory_setup(void) if (DMA_UNCACHED_REGION > (_ramend - _ramstart)) { console_init(); - panic("DMA region exceeds memory limit: %lu.\n", + panic("DMA region exceeds memory limit: %lu.", _ramend - _ramstart); } memory_end = _ramend - DMA_UNCACHED_REGION; @@ -526,14 +535,13 @@ static __init void memory_setup(void) if (mtd_size == 0) { console_init(); - panic("Don't boot kernel without rootfs attached.\n"); + panic("Don't boot kernel without rootfs attached."); } /* Relocate MTD image to the top of memory after the uncached memory area */ - dma_memcpy((char *)memory_end, _end, mtd_size); - - memory_mtd_start = memory_end; - _ebss = memory_mtd_start; /* define _ebss for compatible */ + uclinux_ram_map.phys = memory_mtd_start = memory_end; + uclinux_ram_map.size = mtd_size; + dma_memcpy((void *)uclinux_ram_map.phys, _end, uclinux_ram_map.size); #endif /* CONFIG_MTD_UCLINUX */ #if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263) @@ -796,10 +804,8 @@ void __init setup_arch(char **cmdline_p) cclk = get_cclk(); sclk = get_sclk(); -#if !defined(CONFIG_BFIN_KERNEL_CLOCK) - if (ANOMALY_05000273 && cclk == sclk) - panic("ANOMALY 05000273, SCLK can not be same as CCLK"); -#endif + if ((ANOMALY_05000273 || ANOMALY_05000274) && (cclk >> 1) < sclk) + panic("ANOMALY 05000273 or 05000274: CCLK must be >= 2*SCLK"); #ifdef BF561_FAMILY if (ANOMALY_05000266) { @@ -881,7 +887,7 @@ void __init setup_arch(char **cmdline_p) printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n", bfin_compiled_revid(), bfin_revid()); if (bfin_compiled_revid() > bfin_revid()) - panic("Error: you are missing anomaly workarounds for this rev\n"); + panic("Error: you are missing anomaly workarounds for this rev"); } } if (bfin_revid() < CONFIG_BF_REV_MIN || bfin_revid() > CONFIG_BF_REV_MAX) @@ -891,16 +897,13 @@ void __init setup_arch(char **cmdline_p) /* We can't run on BF548-0.1 due to ANOMALY 05000448 */ if (bfin_cpuid() == 0x27de && bfin_revid() == 1) - panic("You can't run on this processor due to 05000448\n"); + panic("You can't run on this processor due to 05000448"); printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n"); printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n", cclk / 1000000, sclk / 1000000); - if (ANOMALY_05000273 && (cclk >> 1) <= sclk) - printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n"); - setup_bootmem_allocator(); paging_init(); |