diff options
Diffstat (limited to 'arch/mips/powertv/memory.c')
| -rw-r--r-- | arch/mips/powertv/memory.c | 354 |
1 files changed, 0 insertions, 354 deletions
diff --git a/arch/mips/powertv/memory.c b/arch/mips/powertv/memory.c deleted file mode 100644 index 73880ad29bc..00000000000 --- a/arch/mips/powertv/memory.c +++ /dev/null @@ -1,354 +0,0 @@ -/* - * Carsten Langgaard, carstenl@mips.com - * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved. - * Portions copyright (C) 2009 Cisco Systems, Inc. - * - * This program is free software; you can distribute it and/or modify it - * under the terms of the GNU General Public License (Version 2) as - * published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. - * - * Apparently originally from arch/mips/malta-memory.c. Modified to work - * with the PowerTV bootloader. - */ -#include <linux/init.h> -#include <linux/mm.h> -#include <linux/bootmem.h> -#include <linux/pfn.h> -#include <linux/string.h> - -#include <asm/bootinfo.h> -#include <asm/page.h> -#include <asm/sections.h> - -#include <asm/mips-boards/prom.h> -#include <asm/mach-powertv/asic.h> -#include <asm/mach-powertv/ioremap.h> - -#include "init.h" - -/* Memory constants */ -#define KIBIBYTE(n) ((n) * 1024) /* Number of kibibytes */ -#define MEBIBYTE(n) ((n) * KIBIBYTE(1024)) /* Number of mebibytes */ -#define DEFAULT_MEMSIZE MEBIBYTE(128) /* If no memsize provided */ - -#define BLDR_SIZE KIBIBYTE(256) /* Memory reserved for bldr */ -#define RV_SIZE MEBIBYTE(4) /* Size of reset vector */ - -#define LOW_MEM_END 0x20000000 /* Highest low memory address */ -#define BLDR_ALIAS 0x10000000 /* Bootloader address */ -#define RV_PHYS 0x1fc00000 /* Reset vector address */ -#define LOW_RAM_END RV_PHYS /* End of real RAM in low mem */ - -/* - * Very low-level conversion from processor physical address to device - * DMA address for the first bank of memory. - */ -#define PHYS_TO_DMA(paddr) ((paddr) + (CONFIG_LOW_RAM_DMA - LOW_RAM_ALIAS)) - -unsigned long ptv_memsize; - -/* - * struct low_mem_reserved - Items in low memmory that are reserved - * @start: Physical address of item - * @size: Size, in bytes, of this item - * @is_aliased: True if this is RAM aliased from another location. If false, - * it is something other than aliased RAM and the RAM in the - * unaliased address is still visible outside of low memory. - */ -struct low_mem_reserved { - phys_addr_t start; - phys_addr_t size; - bool is_aliased; -}; - -/* - * Must be in ascending address order - */ -struct low_mem_reserved low_mem_reserved[] = { - {BLDR_ALIAS, BLDR_SIZE, true}, /* Bootloader RAM */ - {RV_PHYS, RV_SIZE, false}, /* Reset vector */ -}; - -/* - * struct mem_layout - layout of a piece of the system RAM - * @phys: Physical address of the start of this piece of RAM. This is the - * address at which both the processor and I/O devices see the - * RAM. - * @alias: Alias of this piece of memory in order to make it appear in - * the low memory part of the processor's address space. I/O - * devices don't see anything here. - * @size: Size, in bytes, of this piece of RAM - */ -struct mem_layout { - phys_addr_t phys; - phys_addr_t alias; - phys_addr_t size; -}; - -/* - * struct mem_layout_list - list descriptor for layouts of system RAM pieces - * @family: Specifies the family being described - * @n: Number of &struct mem_layout elements - * @layout: Pointer to the list of &mem_layout structures - */ -struct mem_layout_list { - enum family_type family; - size_t n; - struct mem_layout *layout; -}; - -static struct mem_layout f1500_layout[] = { - {0x20000000, 0x10000000, MEBIBYTE(256)}, -}; - -static struct mem_layout f4500_layout[] = { - {0x40000000, 0x10000000, MEBIBYTE(256)}, - {0x20000000, 0x20000000, MEBIBYTE(32)}, -}; - -static struct mem_layout f8500_layout[] = { - {0x40000000, 0x10000000, MEBIBYTE(256)}, - {0x20000000, 0x20000000, MEBIBYTE(32)}, - {0x30000000, 0x30000000, MEBIBYTE(32)}, -}; - -static struct mem_layout fx600_layout[] = { - {0x20000000, 0x10000000, MEBIBYTE(256)}, - {0x60000000, 0x60000000, MEBIBYTE(128)}, -}; - -static struct mem_layout_list layout_list[] = { - {FAMILY_1500, ARRAY_SIZE(f1500_layout), f1500_layout}, - {FAMILY_1500VZE, ARRAY_SIZE(f1500_layout), f1500_layout}, - {FAMILY_1500VZF, ARRAY_SIZE(f1500_layout), f1500_layout}, - {FAMILY_4500, ARRAY_SIZE(f4500_layout), f4500_layout}, - {FAMILY_8500, ARRAY_SIZE(f8500_layout), f8500_layout}, - {FAMILY_8500RNG, ARRAY_SIZE(f8500_layout), f8500_layout}, - {FAMILY_4600, ARRAY_SIZE(fx600_layout), fx600_layout}, - {FAMILY_4600VZA, ARRAY_SIZE(fx600_layout), fx600_layout}, - {FAMILY_8600, ARRAY_SIZE(fx600_layout), fx600_layout}, - {FAMILY_8600VZB, ARRAY_SIZE(fx600_layout), fx600_layout}, -}; - -/* If we can't determine the layout, use this */ -static struct mem_layout default_layout[] = { - {0x20000000, 0x10000000, MEBIBYTE(128)}, -}; - -/** - * register_non_ram - register low memory not available for RAM usage - */ -static __init void register_non_ram(void) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(low_mem_reserved); i++) - add_memory_region(low_mem_reserved[i].start, - low_mem_reserved[i].size, BOOT_MEM_RESERVED); -} - -/** - * get_memsize - get the size of memory as a single bank - */ -static phys_addr_t get_memsize(void) -{ - static char cmdline[COMMAND_LINE_SIZE] __initdata; - phys_addr_t memsize = 0; - char *memsize_str; - char *ptr; - - /* Check the command line first for a memsize directive */ - strcpy(cmdline, arcs_cmdline); - ptr = strstr(cmdline, "memsize="); - if (ptr && (ptr != cmdline) && (*(ptr - 1) != ' ')) - ptr = strstr(ptr, " memsize="); - - if (ptr) { - memsize = memparse(ptr + 8, &ptr); - } else { - /* otherwise look in the environment */ - memsize_str = prom_getenv("memsize"); - - if (memsize_str != NULL) { - pr_info("prom memsize = %s\n", memsize_str); - memsize = simple_strtol(memsize_str, NULL, 0); - } - - if (memsize == 0) { - if (_prom_memsize != 0) { - memsize = _prom_memsize; - pr_info("_prom_memsize = 0x%x\n", memsize); - /* add in memory that the bootloader doesn't - * report */ - memsize += BLDR_SIZE; - } else { - memsize = DEFAULT_MEMSIZE; - pr_info("Memsize not passed by bootloader, " - "defaulting to 0x%x\n", memsize); - } - } - } - - return memsize; -} - -/** - * register_low_ram - register an aliased section of RAM - * @p: Alias address of memory - * @n: Number of bytes in this section of memory - * - * Returns the number of bytes registered - * - */ -static __init phys_addr_t register_low_ram(phys_addr_t p, phys_addr_t n) -{ - phys_addr_t s; - int i; - phys_addr_t orig_n; - - orig_n = n; - - BUG_ON(p + n > RV_PHYS); - - for (i = 0; n != 0 && i < ARRAY_SIZE(low_mem_reserved); i++) { - phys_addr_t start; - phys_addr_t size; - - start = low_mem_reserved[i].start; - size = low_mem_reserved[i].size; - - /* Handle memory before this low memory section */ - if (p < start) { - phys_addr_t s; - s = min(n, start - p); - add_memory_region(p, s, BOOT_MEM_RAM); - p += s; - n -= s; - } - - /* Handle the low memory section itself. If it's aliased, - * we reduce the number of byes left, but if not, the RAM - * is available elsewhere and we don't reduce the number of - * bytes remaining. */ - if (p == start) { - if (low_mem_reserved[i].is_aliased) { - s = min(n, size); - n -= s; - p += s; - } else - p += n; - } - } - - return orig_n - n; -} - -/* - * register_ram - register real RAM - * @p: Address of memory as seen by devices - * @alias: If the memory is seen at an additional address by the processor, - * this will be the address, otherwise it is the same as @p. - * @n: Number of bytes in this section of memory - */ -static __init void register_ram(phys_addr_t p, phys_addr_t alias, - phys_addr_t n) -{ - /* - * If some or all of this memory has an alias, break it into the - * aliased and non-aliased portion. - */ - if (p != alias) { - phys_addr_t alias_size; - phys_addr_t registered; - - alias_size = min(n, LOW_RAM_END - alias); - registered = register_low_ram(alias, alias_size); - ioremap_add_map(alias, p, n); - n -= registered; - p += registered; - } - -#ifdef CONFIG_HIGHMEM - if (n != 0) { - add_memory_region(p, n, BOOT_MEM_RAM); - ioremap_add_map(p, p, n); - } -#endif -} - -/** - * register_address_space - register things in the address space - * @memsize: Number of bytes of RAM installed - * - * Takes the given number of bytes of RAM and registers as many of the regions, - * or partial regions, as it can. So, the default configuration might have - * two regions with 256 MiB each. If the memsize passed in on the command line - * is 384 MiB, it will register the first region with 256 MiB and the second - * with 128 MiB. - */ -static __init void register_address_space(phys_addr_t memsize) -{ - int i; - phys_addr_t size; - size_t n; - struct mem_layout *layout; - enum family_type family; - - /* - * Register all of the things that aren't available to the kernel as - * memory. - */ - register_non_ram(); - - /* Find the appropriate memory description */ - family = platform_get_family(); - - for (i = 0; i < ARRAY_SIZE(layout_list); i++) { - if (layout_list[i].family == family) - break; - } - - if (i == ARRAY_SIZE(layout_list)) { - n = ARRAY_SIZE(default_layout); - layout = default_layout; - } else { - n = layout_list[i].n; - layout = layout_list[i].layout; - } - - for (i = 0; memsize != 0 && i < n; i++) { - size = min(memsize, layout[i].size); - register_ram(layout[i].phys, layout[i].alias, size); - memsize -= size; - } -} - -void __init prom_meminit(void) -{ - ptv_memsize = get_memsize(); - register_address_space(ptv_memsize); -} - -void __init prom_free_prom_memory(void) -{ - unsigned long addr; - int i; - - for (i = 0; i < boot_mem_map.nr_map; i++) { - if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA) - continue; - - addr = boot_mem_map.map[i].addr; - free_init_pages("prom memory", - addr, addr + boot_mem_map.map[i].size); - } -} |