Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* Hook for machine specific memory setup. |
| 2 | * |
| 3 | * This is included late in kernel/setup.c so that it can make use of all of |
| 4 | * the static functions. */ |
| 5 | |
| 6 | #define MB (1024 * 1024) |
| 7 | |
| 8 | unsigned long sgivwfb_mem_phys; |
| 9 | unsigned long sgivwfb_mem_size; |
| 10 | |
| 11 | long long mem_size __initdata = 0; |
| 12 | |
| 13 | static char * __init machine_specific_memory_setup(void) |
| 14 | { |
| 15 | long long gfx_mem_size = 8 * MB; |
| 16 | |
| 17 | mem_size = ALT_MEM_K; |
| 18 | |
| 19 | if (!mem_size) { |
| 20 | printk(KERN_WARNING "Bootloader didn't set memory size, upgrade it !\n"); |
| 21 | mem_size = 128 * MB; |
| 22 | } |
| 23 | |
| 24 | /* |
| 25 | * this hardcodes the graphics memory to 8 MB |
| 26 | * it really should be sized dynamically (or at least |
| 27 | * set as a boot param) |
| 28 | */ |
| 29 | if (!sgivwfb_mem_size) { |
| 30 | printk(KERN_WARNING "Defaulting to 8 MB framebuffer size\n"); |
| 31 | sgivwfb_mem_size = 8 * MB; |
| 32 | } |
| 33 | |
| 34 | /* |
| 35 | * Trim to nearest MB |
| 36 | */ |
| 37 | sgivwfb_mem_size &= ~((1 << 20) - 1); |
| 38 | sgivwfb_mem_phys = mem_size - gfx_mem_size; |
| 39 | |
| 40 | add_memory_region(0, LOWMEMSIZE(), E820_RAM); |
| 41 | add_memory_region(HIGH_MEMORY, mem_size - sgivwfb_mem_size - HIGH_MEMORY, E820_RAM); |
| 42 | add_memory_region(sgivwfb_mem_phys, sgivwfb_mem_size, E820_RESERVED); |
| 43 | |
| 44 | return "PROM"; |
| 45 | |
| 46 | /* Remove gcc warnings */ |
| 47 | (void) sanitize_e820_map(NULL, NULL); |
| 48 | (void) copy_e820_map(NULL, 0); |
| 49 | } |