diff options
Diffstat (limited to 'arch/blackfin/kernel/setup.c')
| -rw-r--r-- | arch/blackfin/kernel/setup.c | 131 |
1 files changed, 107 insertions, 24 deletions
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index 2255c289a714..8efea004aecb 100644 --- a/arch/blackfin/kernel/setup.c +++ b/arch/blackfin/kernel/setup.c @@ -35,6 +35,7 @@ u16 _bfin_swrst; EXPORT_SYMBOL(_bfin_swrst); unsigned long memory_start, memory_end, physical_mem_end; +unsigned long _rambase, _ramstart, _ramend; unsigned long reserved_mem_dcache_on; unsigned long reserved_mem_icache_on; EXPORT_SYMBOL(memory_start); @@ -106,7 +107,7 @@ void __init bf53x_relocate_l1_mem(void) l1_code_length = _etext_l1 - _stext_l1; if (l1_code_length > L1_CODE_LENGTH) - 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! */ @@ -116,19 +117,18 @@ void __init bf53x_relocate_l1_mem(void) l1_data_a_length = _ebss_l1 - _sdata_l1; if (l1_data_a_length > L1_DATA_A_LENGTH) - l1_data_a_length = L1_DATA_A_LENGTH; + panic("L1 Data SRAM Bank A Overflow\n"); /* Copy _sdata_l1 to _ebss_l1 to L1 data bank A SRAM */ dma_memcpy(_sdata_l1, _l1_lma_start + l1_code_length, l1_data_a_length); l1_data_b_length = _ebss_b_l1 - _sdata_b_l1; if (l1_data_b_length > L1_DATA_B_LENGTH) - l1_data_b_length = L1_DATA_B_LENGTH; + panic("L1 Data SRAM Bank B Overflow\n"); /* Copy _sdata_b_l1 to _ebss_b_l1 to L1 data bank B SRAM */ dma_memcpy(_sdata_b_l1, _l1_lma_start + l1_code_length + l1_data_a_length, l1_data_b_length); - } /* add_memory_region to memmap */ @@ -547,11 +547,38 @@ static __init void memory_setup(void) ); } +/* + * Find the lowest, highest page frame number we have available + */ +void __init find_min_max_pfn(void) +{ + int i; + + max_pfn = 0; + min_low_pfn = memory_end; + + for (i = 0; i < bfin_memmap.nr_map; i++) { + unsigned long start, end; + /* RAM? */ + if (bfin_memmap.map[i].type != BFIN_MEMMAP_RAM) + continue; + start = PFN_UP(bfin_memmap.map[i].addr); + end = PFN_DOWN(bfin_memmap.map[i].addr + + bfin_memmap.map[i].size); + if (start >= end) + continue; + if (end > max_pfn) + max_pfn = end; + if (start < min_low_pfn) + min_low_pfn = start; + } +} + static __init void setup_bootmem_allocator(void) { int bootmap_size; int i; - unsigned long min_pfn, max_pfn; + unsigned long start_pfn, end_pfn; unsigned long curr_pfn, last_pfn, size; /* mark memory between memory_start and memory_end usable */ @@ -561,8 +588,19 @@ static __init void setup_bootmem_allocator(void) sanitize_memmap(bfin_memmap.map, &bfin_memmap.nr_map); print_memory_map("boot memmap"); - min_pfn = PAGE_OFFSET >> PAGE_SHIFT; - max_pfn = memory_end >> PAGE_SHIFT; + /* intialize globals in linux/bootmem.h */ + find_min_max_pfn(); + /* pfn of the last usable page frame */ + if (max_pfn > memory_end >> PAGE_SHIFT) + max_pfn = memory_end >> PAGE_SHIFT; + /* pfn of last page frame directly mapped by kernel */ + max_low_pfn = max_pfn; + /* pfn of the first usable page frame after kernel image*/ + if (min_low_pfn < memory_start >> PAGE_SHIFT) + min_low_pfn = memory_start >> PAGE_SHIFT; + + start_pfn = PAGE_OFFSET >> PAGE_SHIFT; + end_pfn = memory_end >> PAGE_SHIFT; /* * give all the memory to the bootmap allocator, tell it to put the @@ -570,7 +608,7 @@ static __init void setup_bootmem_allocator(void) */ bootmap_size = init_bootmem_node(NODE_DATA(0), memory_start >> PAGE_SHIFT, /* map goes here */ - min_pfn, max_pfn); + start_pfn, end_pfn); /* register the memmap regions with the bootmem allocator */ for (i = 0; i < bfin_memmap.nr_map; i++) { @@ -583,7 +621,7 @@ static __init void setup_bootmem_allocator(void) * We are rounding up the start address of usable memory: */ curr_pfn = PFN_UP(bfin_memmap.map[i].addr); - if (curr_pfn >= max_pfn) + if (curr_pfn >= end_pfn) continue; /* * ... and at the end of the usable range downwards: @@ -591,8 +629,8 @@ static __init void setup_bootmem_allocator(void) last_pfn = PFN_DOWN(bfin_memmap.map[i].addr + bfin_memmap.map[i].size); - if (last_pfn > max_pfn) - last_pfn = max_pfn; + if (last_pfn > end_pfn) + last_pfn = end_pfn; /* * .. finally, did all the rounding and playing @@ -611,9 +649,59 @@ static __init void setup_bootmem_allocator(void) BOOTMEM_DEFAULT); } +#define EBSZ_TO_MEG(ebsz) \ +({ \ + int meg = 0; \ + switch (ebsz & 0xf) { \ + case 0x1: meg = 16; break; \ + case 0x3: meg = 32; break; \ + case 0x5: meg = 64; break; \ + case 0x7: meg = 128; break; \ + case 0x9: meg = 256; break; \ + case 0xb: meg = 512; break; \ + } \ + meg; \ +}) +static inline int __init get_mem_size(void) +{ +#ifdef CONFIG_MEM_SIZE + return CONFIG_MEM_SIZE; +#else +# if defined(EBIU_SDBCTL) +# if defined(BF561_FAMILY) + int ret = 0; + u32 sdbctl = bfin_read_EBIU_SDBCTL(); + ret += EBSZ_TO_MEG(sdbctl >> 0); + ret += EBSZ_TO_MEG(sdbctl >> 8); + ret += EBSZ_TO_MEG(sdbctl >> 16); + ret += EBSZ_TO_MEG(sdbctl >> 24); + return ret; +# else + return EBSZ_TO_MEG(bfin_read_EBIU_SDBCTL()); +# endif +# elif defined(EBIU_DDRCTL1) + u32 ddrctl = bfin_read_EBIU_DDRCTL1(); + int ret = 0; + switch (ddrctl & 0xc0000) { + case DEVSZ_64: ret = 64 / 8; + case DEVSZ_128: ret = 128 / 8; + case DEVSZ_256: ret = 256 / 8; + case DEVSZ_512: ret = 512 / 8; + } + switch (ddrctl & 0x30000) { + case DEVWD_4: ret *= 2; + case DEVWD_8: ret *= 2; + case DEVWD_16: break; + } + return ret; +# endif +#endif + BUG(); +} + void __init setup_arch(char **cmdline_p) { - unsigned long l1_length, sclk, cclk; + unsigned long sclk, cclk; #ifdef CONFIG_DUMMY_CONSOLE conswitchp = &dummy_con; @@ -631,7 +719,7 @@ void __init setup_arch(char **cmdline_p) /* setup memory defaults from the user config */ physical_mem_end = 0; - _ramend = CONFIG_MEM_SIZE * 1024 * 1024; + _ramend = get_mem_size() * 1024 * 1024; memset(&bfin_memmap, 0, sizeof(bfin_memmap)); @@ -712,15 +800,6 @@ void __init setup_arch(char **cmdline_p) paging_init(); - /* check the size of the l1 area */ - l1_length = _etext_l1 - _stext_l1; - if (l1_length > L1_CODE_LENGTH) - panic("L1 code memory overflow\n"); - - l1_length = _ebss_l1 - _sdata_l1; - if (l1_length > L1_DATA_A_LENGTH) - panic("L1 data memory overflow\n"); - /* Copy atomic sequences to their fixed location, and sanity check that these locations are the ones that we advertise to userspace. */ memcpy((void *)FIXED_CODE_START, &fixed_code_start, @@ -859,12 +938,17 @@ static int show_cpuinfo(struct seq_file *m, void *v) seq_printf(m, "processor\t: %d\n" "vendor_id\t: %s\n" "cpu family\t: 0x%x\n" - "model name\t: ADSP-%s %lu(MHz CCLK) %lu(MHz SCLK)\n" + "model name\t: ADSP-%s %lu(MHz CCLK) %lu(MHz SCLK) (%s)\n" "stepping\t: %d\n", 0, vendor, (bfin_read_CHIPID() & CHIPID_FAMILY), cpu, cclk/1000000, sclk/1000000, +#ifdef CONFIG_MPU + "mpu on", +#else + "mpu off", +#endif revid); seq_printf(m, "cpu MHz\t\t: %lu.%03lu/%lu.%03lu\n", @@ -973,7 +1057,6 @@ static int show_cpuinfo(struct seq_file *m, void *v) seq_printf(m, "No Ways are locked\n"); } #endif - seq_printf(m, "board name\t: %s\n", bfin_board_name); seq_printf(m, "board memory\t: %ld kB (0x%p -> 0x%p)\n", physical_mem_end >> 10, (void *)0, (void *)physical_mem_end); |