Songmao Tian | 42d226c | 2007-06-06 14:52:38 +0800 | [diff] [blame] | 1 | /* |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 2 | * This program is free software; you can redistribute it and/or modify it |
| 3 | * under the terms of the GNU General Public License as published by the |
Songmao Tian | 42d226c | 2007-06-06 14:52:38 +0800 | [diff] [blame] | 4 | * Free Software Foundation; either version 2 of the License, or (at your |
| 5 | * option) any later version. |
| 6 | */ |
| 7 | #include <linux/fs.h> |
| 8 | #include <linux/fcntl.h> |
| 9 | #include <linux/mm.h> |
| 10 | |
Wu Zhangjin | bd92aa0 | 2009-07-02 23:22:36 +0800 | [diff] [blame] | 11 | #include <asm/bootinfo.h> |
| 12 | |
Wu Zhangjin | 5e983ff | 2009-07-02 23:23:03 +0800 | [diff] [blame] | 13 | #include <loongson.h> |
Wu Zhangjin | 85749d2 | 2009-07-02 23:26:45 +0800 | [diff] [blame] | 14 | #include <mem.h> |
Wu Zhangjin | 659da2ba | 2009-10-16 14:17:15 +0800 | [diff] [blame] | 15 | #include <pci.h> |
Wu Zhangjin | bd92aa0 | 2009-07-02 23:22:36 +0800 | [diff] [blame] | 16 | |
| 17 | void __init prom_init_memory(void) |
| 18 | { |
Wu Zhangjin | 50549bd | 2010-01-04 17:16:50 +0800 | [diff] [blame] | 19 | add_memory_region(0x0, (memsize << 20), BOOT_MEM_RAM); |
Wu Zhangjin | 659da2ba | 2009-10-16 14:17:15 +0800 | [diff] [blame] | 20 | |
Wu Zhangjin | 50549bd | 2010-01-04 17:16:50 +0800 | [diff] [blame] | 21 | add_memory_region(memsize << 20, LOONGSON_PCI_MEM_START - (memsize << |
| 22 | 20), BOOT_MEM_RESERVED); |
| 23 | |
Wu Zhangjin | 55045ff | 2009-11-11 13:39:12 +0800 | [diff] [blame] | 24 | #ifdef CONFIG_CPU_SUPPORTS_ADDRWINCFG |
Wu Zhangjin | 6f7a251 | 2009-11-06 18:45:05 +0800 | [diff] [blame] | 25 | { |
| 26 | int bit; |
Wu Zhangjin | 659da2ba | 2009-10-16 14:17:15 +0800 | [diff] [blame] | 27 | |
Wu Zhangjin | 6f7a251 | 2009-11-06 18:45:05 +0800 | [diff] [blame] | 28 | bit = fls(memsize + highmemsize); |
| 29 | if (bit != ffs(memsize + highmemsize)) |
| 30 | bit += 20; |
| 31 | else |
| 32 | bit = bit + 20 - 1; |
Wu Zhangjin | 659da2ba | 2009-10-16 14:17:15 +0800 | [diff] [blame] | 33 | |
Wu Zhangjin | 6f7a251 | 2009-11-06 18:45:05 +0800 | [diff] [blame] | 34 | /* set cpu window3 to map CPU to DDR: 2G -> 2G */ |
| 35 | LOONGSON_ADDRWIN_CPUTODDR(ADDRWIN_WIN3, 0x80000000ul, |
| 36 | 0x80000000ul, (1 << bit)); |
| 37 | mmiowb(); |
| 38 | } |
Wu Zhangjin | 55045ff | 2009-11-11 13:39:12 +0800 | [diff] [blame] | 39 | #endif /* !CONFIG_CPU_SUPPORTS_ADDRWINCFG */ |
Wu Zhangjin | 6f7a251 | 2009-11-06 18:45:05 +0800 | [diff] [blame] | 40 | |
Wu Zhangjin | 55045ff | 2009-11-11 13:39:12 +0800 | [diff] [blame] | 41 | #ifdef CONFIG_64BIT |
Wu Zhangjin | 6f7a251 | 2009-11-06 18:45:05 +0800 | [diff] [blame] | 42 | if (highmemsize > 0) |
| 43 | add_memory_region(LOONGSON_HIGHMEM_START, |
| 44 | highmemsize << 20, BOOT_MEM_RAM); |
| 45 | |
| 46 | add_memory_region(LOONGSON_PCI_MEM_END + 1, LOONGSON_HIGHMEM_START - |
| 47 | LOONGSON_PCI_MEM_END - 1, BOOT_MEM_RESERVED); |
| 48 | |
Wu Zhangjin | 55045ff | 2009-11-11 13:39:12 +0800 | [diff] [blame] | 49 | #endif /* !CONFIG_64BIT */ |
Wu Zhangjin | bd92aa0 | 2009-07-02 23:22:36 +0800 | [diff] [blame] | 50 | } |
| 51 | |
Songmao Tian | 42d226c | 2007-06-06 14:52:38 +0800 | [diff] [blame] | 52 | /* override of arch/mips/mm/cache.c: __uncached_access */ |
| 53 | int __uncached_access(struct file *file, unsigned long addr) |
| 54 | { |
Christoph Hellwig | 6b2f3d1 | 2009-10-27 11:05:28 +0100 | [diff] [blame] | 55 | if (file->f_flags & O_DSYNC) |
Songmao Tian | 42d226c | 2007-06-06 14:52:38 +0800 | [diff] [blame] | 56 | return 1; |
| 57 | |
Songmao Tian | 42d226c | 2007-06-06 14:52:38 +0800 | [diff] [blame] | 58 | return addr >= __pa(high_memory) || |
Wu Zhangjin | 85749d2 | 2009-07-02 23:26:45 +0800 | [diff] [blame] | 59 | ((addr >= LOONGSON_MMIO_MEM_START) && |
| 60 | (addr < LOONGSON_MMIO_MEM_END)); |
Songmao Tian | 42d226c | 2007-06-06 14:52:38 +0800 | [diff] [blame] | 61 | } |
Wu Zhangjin | 22f1fdf | 2009-11-11 13:59:23 +0800 | [diff] [blame] | 62 | |
| 63 | #ifdef CONFIG_CPU_SUPPORTS_UNCACHED_ACCELERATED |
| 64 | |
| 65 | #include <linux/pci.h> |
| 66 | #include <linux/sched.h> |
| 67 | #include <asm/current.h> |
| 68 | |
| 69 | static unsigned long uca_start, uca_end; |
| 70 | |
| 71 | pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, |
| 72 | unsigned long size, pgprot_t vma_prot) |
| 73 | { |
| 74 | unsigned long offset = pfn << PAGE_SHIFT; |
| 75 | unsigned long end = offset + size; |
| 76 | |
| 77 | if (__uncached_access(file, offset)) { |
Arnaud Patard | 514b6d0 | 2010-04-29 11:58:49 +0200 | [diff] [blame] | 78 | if (uca_start && (offset >= uca_start) && |
Wu Zhangjin | 22f1fdf | 2009-11-11 13:59:23 +0800 | [diff] [blame] | 79 | (end <= uca_end)) |
| 80 | return __pgprot((pgprot_val(vma_prot) & |
| 81 | ~_CACHE_MASK) | |
| 82 | _CACHE_UNCACHED_ACCELERATED); |
| 83 | else |
| 84 | return pgprot_noncached(vma_prot); |
| 85 | } |
| 86 | return vma_prot; |
| 87 | } |
| 88 | |
| 89 | static int __init find_vga_mem_init(void) |
| 90 | { |
| 91 | struct pci_dev *dev = 0; |
| 92 | struct resource *r; |
| 93 | int idx; |
| 94 | |
| 95 | if (uca_start) |
| 96 | return 0; |
| 97 | |
| 98 | for_each_pci_dev(dev) { |
Richard LIU | ff40ad7 | 2010-04-29 11:58:47 +0200 | [diff] [blame] | 99 | if ((dev->class >> 16) == PCI_BASE_CLASS_DISPLAY) { |
Wu Zhangjin | 22f1fdf | 2009-11-11 13:59:23 +0800 | [diff] [blame] | 100 | for (idx = 0; idx < PCI_NUM_RESOURCES; idx++) { |
| 101 | r = &dev->resource[idx]; |
| 102 | if (!r->start && r->end) |
| 103 | continue; |
| 104 | if (r->flags & IORESOURCE_IO) |
| 105 | continue; |
| 106 | if (r->flags & IORESOURCE_MEM) { |
| 107 | uca_start = r->start; |
| 108 | uca_end = r->end; |
| 109 | return 0; |
| 110 | } |
| 111 | } |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | return 0; |
| 116 | } |
| 117 | |
| 118 | late_initcall(find_vga_mem_init); |
| 119 | #endif /* !CONFIG_CPU_SUPPORTS_UNCACHED_ACCELERATED */ |