Commit | Line | Data |
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88278ca2 | 1 | /* |
1da177e4 LT |
2 | * palloc.c: Memory allocation from the Sun PROM. |
3 | * | |
4 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) | |
5 | */ | |
6 | ||
7 | #include <asm/openprom.h> | |
8 | #include <asm/oplib.h> | |
9 | ||
10 | /* You should not call these routines after memory management | |
11 | * has been initialized in the kernel, if fact you should not | |
12 | * use these if at all possible in the kernel. They are mainly | |
13 | * to be used for a bootloader for temporary allocations which | |
14 | * it will free before jumping into the kernel it has loaded. | |
15 | * | |
16 | * Also, these routines don't work on V0 proms, only V2 and later. | |
17 | */ | |
18 | ||
19 | /* Allocate a chunk of memory of size 'num_bytes' giving a suggestion | |
20 | * of virtual_hint as the preferred virtual base address of this chunk. | |
21 | * There are no guarantees that you will get the allocation, or that | |
22 | * the prom will abide by your "hint". So check your return value. | |
23 | */ | |
24 | char * | |
25 | prom_alloc(char *virtual_hint, unsigned int num_bytes) | |
26 | { | |
27 | if(prom_vers == PROM_V0) return (char *) 0x0; | |
28 | if(num_bytes == 0x0) return (char *) 0x0; | |
29 | return (*(romvec->pv_v2devops.v2_dumb_mem_alloc))(virtual_hint, num_bytes); | |
30 | } | |
31 | ||
32 | /* Free a previously allocated chunk back to the prom at virtual address | |
33 | * 'vaddr' of size 'num_bytes'. NOTE: This vaddr is not the hint you | |
34 | * used for the allocation, but the virtual address the prom actually | |
35 | * returned to you. They may be have been the same, they may have not, | |
36 | * doesn't matter. | |
37 | */ | |
38 | void | |
39 | prom_free(char *vaddr, unsigned int num_bytes) | |
40 | { | |
41 | if((prom_vers == PROM_V0) || (num_bytes == 0x0)) return; | |
42 | (*(romvec->pv_v2devops.v2_dumb_mem_free))(vaddr, num_bytes); | |
1da177e4 | 43 | } |