projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 42d226c7 ST |
1 | /* |
| 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 | |
| 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 | ||
| bd92aa01 WZ |
11 | #include <asm/bootinfo.h> |
| 12 | ||
| 5e983ff6 | 13 | #include <loongson.h> |
| 85749d24 | 14 | #include <mem.h> |
| 659da2ba | 15 | #include <pci.h> |
| bd92aa01 WZ |
16 | |
| 17 | void __init prom_init_memory(void) | |
| 18 | { | |
| 19 | add_memory_region(0x0, (memsize << 20), BOOT_MEM_RAM); | |
| 659da2ba WZ |
20 | |
| 21 | add_memory_region(memsize << 20, LOONGSON_PCI_MEM_START - (memsize << | |
| 22 | 20), BOOT_MEM_RESERVED); | |
| 55045ff5 | 23 | #ifdef CONFIG_CPU_SUPPORTS_ADDRWINCFG |
| 6f7a251a WZ |
24 | { |
| 25 | int bit; | |
| 26 | ||
| 27 | bit = fls(memsize + highmemsize); | |
| 28 | if (bit != ffs(memsize + highmemsize)) | |
| 29 | bit += 20; | |
| 30 | else | |
| 31 | bit = bit + 20 - 1; | |
| 32 | ||
| 33 | /* set cpu window3 to map CPU to DDR: 2G -> 2G */ | |
| 34 | LOONGSON_ADDRWIN_CPUTODDR(ADDRWIN_WIN3, 0x80000000ul, | |
| 35 | 0x80000000ul, (1 << bit)); | |
| 36 | mmiowb(); | |
| 37 | } | |
| 55045ff5 | 38 | #endif /* !CONFIG_CPU_SUPPORTS_ADDRWINCFG */ |
| 6f7a251a | 39 | |
| 55045ff5 | 40 | #ifdef CONFIG_64BIT |
| 6f7a251a WZ |
41 | if (highmemsize > 0) |
| 42 | add_memory_region(LOONGSON_HIGHMEM_START, | |
| 43 | highmemsize << 20, BOOT_MEM_RAM); | |
| 44 | ||
| 45 | add_memory_region(LOONGSON_PCI_MEM_END + 1, LOONGSON_HIGHMEM_START - | |
| 46 | LOONGSON_PCI_MEM_END - 1, BOOT_MEM_RESERVED); | |
| 47 | ||
| 55045ff5 | 48 | #endif /* !CONFIG_64BIT */ |
| bd92aa01 WZ |
49 | } |
| 50 | ||
| 42d226c7 ST |
51 | /* override of arch/mips/mm/cache.c: __uncached_access */ |
| 52 | int __uncached_access(struct file *file, unsigned long addr) | |
| 53 | { | |
| 6b2f3d1f | 54 | if (file->f_flags & O_DSYNC) |
| 42d226c7 ST |
55 | return 1; |
| 56 | ||
| 42d226c7 | 57 | return addr >= __pa(high_memory) || |
| 85749d24 WZ |
58 | ((addr >= LOONGSON_MMIO_MEM_START) && |
| 59 | (addr < LOONGSON_MMIO_MEM_END)); | |
| 42d226c7 | 60 | } |
| 22f1fdfd WZ |
61 | |
| 62 | #ifdef CONFIG_CPU_SUPPORTS_UNCACHED_ACCELERATED | |
| 63 | ||
| 64 | #include <linux/pci.h> | |
| 65 | #include <linux/sched.h> | |
| 66 | #include <asm/current.h> | |
| 67 | ||
| 68 | static unsigned long uca_start, uca_end; | |
| 69 | ||
| 70 | pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, | |
| 71 | unsigned long size, pgprot_t vma_prot) | |
| 72 | { | |
| 73 | unsigned long offset = pfn << PAGE_SHIFT; | |
| 74 | unsigned long end = offset + size; | |
| 75 | ||
| 76 | if (__uncached_access(file, offset)) { | |
| 77 | if (((uca_start && offset) >= uca_start) && | |
| 78 | (end <= uca_end)) | |
| 79 | return __pgprot((pgprot_val(vma_prot) & | |
| 80 | ~_CACHE_MASK) | | |
| 81 | _CACHE_UNCACHED_ACCELERATED); | |
| 82 | else | |
| 83 | return pgprot_noncached(vma_prot); | |
| 84 | } | |
| 85 | return vma_prot; | |
| 86 | } | |
| 87 | ||
| 88 | static int __init find_vga_mem_init(void) | |
| 89 | { | |
| 90 | struct pci_dev *dev = 0; | |
| 91 | struct resource *r; | |
| 92 | int idx; | |
| 93 | ||
| 94 | if (uca_start) | |
| 95 | return 0; | |
| 96 | ||
| 97 | for_each_pci_dev(dev) { | |
| 98 | if ((dev->class >> 8) == PCI_CLASS_DISPLAY_VGA) { | |
| 99 | for (idx = 0; idx < PCI_NUM_RESOURCES; idx++) { | |
| 100 | r = &dev->resource[idx]; | |
| 101 | if (!r->start && r->end) | |
| 102 | continue; | |
| 103 | if (r->flags & IORESOURCE_IO) | |
| 104 | continue; | |
| 105 | if (r->flags & IORESOURCE_MEM) { | |
| 106 | uca_start = r->start; | |
| 107 | uca_end = r->end; | |
| 108 | return 0; | |
| 109 | } | |
| 110 | } | |
| 111 | } | |
| 112 | } | |
| 113 | ||
| 114 | return 0; | |
| 115 | } | |
| 116 | ||
| 117 | late_initcall(find_vga_mem_init); | |
| 118 | #endif /* !CONFIG_CPU_SUPPORTS_UNCACHED_ACCELERATED */ |