Dima Zavin | a404bce | 2009-01-26 12:32:22 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2009, Google Inc. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * * Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * * Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in |
| 12 | * the documentation and/or other materials provided with the |
| 13 | * distribution. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 16 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 17 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 18 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 19 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 21 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| 22 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 23 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 24 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 25 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 26 | * SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | #include <debug.h> |
| 30 | #include <reg.h> |
| 31 | #include <sys/types.h> |
| 32 | #include <platform/iomap.h> |
| 33 | |
| 34 | #include "smem.h" |
| 35 | |
| 36 | static struct smem *smem = (void *)(MSM_SHARED_BASE); |
| 37 | |
Ajay Dudani | c78b36f | 2010-07-08 19:34:06 -0700 | [diff] [blame] | 38 | /* buf MUST be 4byte aligned, and len MUST be a multiple of 8. */ |
Dima Zavin | a404bce | 2009-01-26 12:32:22 -0800 | [diff] [blame] | 39 | unsigned smem_read_alloc_entry(smem_mem_type_t type, void *buf, int len) |
| 40 | { |
| 41 | struct smem_alloc_info *ainfo; |
| 42 | unsigned *dest = buf; |
| 43 | unsigned src; |
| 44 | unsigned size; |
| 45 | |
| 46 | if (((len & 0x3) != 0) || (((unsigned)buf & 0x3) != 0)) |
| 47 | return 1; |
| 48 | |
| 49 | if (type < SMEM_FIRST_VALID_TYPE || type > SMEM_LAST_VALID_TYPE) |
| 50 | return 1; |
| 51 | |
| 52 | /* TODO: Use smem spinlocks */ |
| 53 | ainfo = &smem->alloc_info[type]; |
| 54 | if (readl(&ainfo->allocated) == 0) |
| 55 | return 1; |
| 56 | |
Ajay Dudani | c78b36f | 2010-07-08 19:34:06 -0700 | [diff] [blame] | 57 | size = readl(&ainfo->size); |
| 58 | |
| 59 | if (size != (unsigned)((len + 7) & ~0x00000007)) |
Dima Zavin | a404bce | 2009-01-26 12:32:22 -0800 | [diff] [blame] | 60 | return 1; |
| 61 | |
| 62 | src = MSM_SHARED_BASE + readl(&ainfo->offset); |
Ajay Dudani | c78b36f | 2010-07-08 19:34:06 -0700 | [diff] [blame] | 63 | for (; len > 0; src += 4, len -= 4) |
Dima Zavin | a404bce | 2009-01-26 12:32:22 -0800 | [diff] [blame] | 64 | *(dest++) = readl(src); |
| 65 | |
| 66 | return 0; |
| 67 | } |
Chandan Uddaraju | 1434a60 | 2010-03-08 17:13:38 -0800 | [diff] [blame] | 68 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame^] | 69 | unsigned |
| 70 | smem_read_alloc_entry_offset(smem_mem_type_t type, void *buf, int len, |
| 71 | int offset) |
Chandan Uddaraju | 1434a60 | 2010-03-08 17:13:38 -0800 | [diff] [blame] | 72 | { |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame^] | 73 | struct smem_alloc_info *ainfo; |
| 74 | unsigned *dest = buf; |
| 75 | unsigned src; |
| 76 | unsigned size = len; |
Chandan Uddaraju | 1434a60 | 2010-03-08 17:13:38 -0800 | [diff] [blame] | 77 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame^] | 78 | if (((len & 0x3) != 0) || (((unsigned)buf & 0x3) != 0)) |
| 79 | return 1; |
Chandan Uddaraju | 1434a60 | 2010-03-08 17:13:38 -0800 | [diff] [blame] | 80 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame^] | 81 | if (type < SMEM_FIRST_VALID_TYPE || type > SMEM_LAST_VALID_TYPE) |
| 82 | return 1; |
Chandan Uddaraju | 1434a60 | 2010-03-08 17:13:38 -0800 | [diff] [blame] | 83 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame^] | 84 | ainfo = &smem->alloc_info[type]; |
| 85 | if (readl(&ainfo->allocated) == 0) |
| 86 | return 1; |
Chandan Uddaraju | 1434a60 | 2010-03-08 17:13:38 -0800 | [diff] [blame] | 87 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame^] | 88 | src = MSM_SHARED_BASE + readl(&ainfo->offset) + offset; |
| 89 | for (; size > 0; src += 4, size -= 4) |
| 90 | *(dest++) = readl(src); |
Chandan Uddaraju | 1434a60 | 2010-03-08 17:13:38 -0800 | [diff] [blame] | 91 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame^] | 92 | return 0; |
Chandan Uddaraju | 1434a60 | 2010-03-08 17:13:38 -0800 | [diff] [blame] | 93 | } |