Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 1 | /* |
Robin Getz | 96f1050 | 2009-09-24 14:11:24 +0000 | [diff] [blame^] | 2 | * SRAM allocator for Blackfin on-chip memory |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 3 | * |
Robin Getz | 96f1050 | 2009-09-24 14:11:24 +0000 | [diff] [blame^] | 4 | * Copyright 2004-2009 Analog Devices Inc. |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 5 | * |
Robin Getz | 96f1050 | 2009-09-24 14:11:24 +0000 | [diff] [blame^] | 6 | * Licensed under the GPL-2 or later. |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 7 | */ |
| 8 | |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 9 | #include <linux/module.h> |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/types.h> |
| 12 | #include <linux/miscdevice.h> |
| 13 | #include <linux/ioport.h> |
| 14 | #include <linux/fcntl.h> |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/poll.h> |
| 17 | #include <linux/proc_fs.h> |
| 18 | #include <linux/spinlock.h> |
| 19 | #include <linux/rtc.h> |
| 20 | #include <asm/blackfin.h> |
Graf Yang | dbc895f | 2009-01-07 23:14:39 +0800 | [diff] [blame] | 21 | #include <asm/mem_map.h> |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 22 | #include "blackfin_sram.h" |
| 23 | |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 24 | /* the data structure for L1 scratchpad and DATA SRAM */ |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 25 | struct sram_piece { |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 26 | void *paddr; |
| 27 | int size; |
Mike Frysinger | bc61b4e | 2007-06-14 13:21:08 +0800 | [diff] [blame] | 28 | pid_t pid; |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 29 | struct sram_piece *next; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 30 | }; |
| 31 | |
Mike Frysinger | 81c969a | 2009-07-01 15:42:13 +0000 | [diff] [blame] | 32 | static DEFINE_PER_CPU_SHARED_ALIGNED(spinlock_t, l1sram_lock); |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 33 | static DEFINE_PER_CPU(struct sram_piece, free_l1_ssram_head); |
| 34 | static DEFINE_PER_CPU(struct sram_piece, used_l1_ssram_head); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 35 | |
| 36 | #if L1_DATA_A_LENGTH != 0 |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 37 | static DEFINE_PER_CPU(struct sram_piece, free_l1_data_A_sram_head); |
| 38 | static DEFINE_PER_CPU(struct sram_piece, used_l1_data_A_sram_head); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 39 | #endif |
| 40 | |
| 41 | #if L1_DATA_B_LENGTH != 0 |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 42 | static DEFINE_PER_CPU(struct sram_piece, free_l1_data_B_sram_head); |
| 43 | static DEFINE_PER_CPU(struct sram_piece, used_l1_data_B_sram_head); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 44 | #endif |
| 45 | |
Mike Frysinger | 81c969a | 2009-07-01 15:42:13 +0000 | [diff] [blame] | 46 | #if L1_DATA_A_LENGTH || L1_DATA_B_LENGTH |
| 47 | static DEFINE_PER_CPU_SHARED_ALIGNED(spinlock_t, l1_data_sram_lock); |
| 48 | #endif |
| 49 | |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 50 | #if L1_CODE_LENGTH != 0 |
Mike Frysinger | 81c969a | 2009-07-01 15:42:13 +0000 | [diff] [blame] | 51 | static DEFINE_PER_CPU_SHARED_ALIGNED(spinlock_t, l1_inst_sram_lock); |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 52 | static DEFINE_PER_CPU(struct sram_piece, free_l1_inst_sram_head); |
| 53 | static DEFINE_PER_CPU(struct sram_piece, used_l1_inst_sram_head); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 54 | #endif |
| 55 | |
Mike Frysinger | 07aa7be | 2008-08-13 16:16:11 +0800 | [diff] [blame] | 56 | #if L2_LENGTH != 0 |
Mike Frysinger | 81c969a | 2009-07-01 15:42:13 +0000 | [diff] [blame] | 57 | static spinlock_t l2_sram_lock ____cacheline_aligned_in_smp; |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 58 | static struct sram_piece free_l2_sram_head, used_l2_sram_head; |
| 59 | #endif |
| 60 | |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 61 | static struct kmem_cache *sram_piece_cache; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 62 | |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 63 | /* L1 Scratchpad SRAM initialization function */ |
| 64 | static void __init l1sram_init(void) |
| 65 | { |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 66 | unsigned int cpu; |
Graf Yang | 89ecd50 | 2009-05-25 06:40:42 +0000 | [diff] [blame] | 67 | unsigned long reserve; |
| 68 | |
| 69 | #ifdef CONFIG_SMP |
| 70 | reserve = 0; |
| 71 | #else |
| 72 | reserve = sizeof(struct l1_scratch_task_info); |
| 73 | #endif |
| 74 | |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 75 | for (cpu = 0; cpu < num_possible_cpus(); ++cpu) { |
| 76 | per_cpu(free_l1_ssram_head, cpu).next = |
| 77 | kmem_cache_alloc(sram_piece_cache, GFP_KERNEL); |
| 78 | if (!per_cpu(free_l1_ssram_head, cpu).next) { |
| 79 | printk(KERN_INFO "Fail to initialize Scratchpad data SRAM.\n"); |
| 80 | return; |
| 81 | } |
| 82 | |
Graf Yang | 89ecd50 | 2009-05-25 06:40:42 +0000 | [diff] [blame] | 83 | per_cpu(free_l1_ssram_head, cpu).next->paddr = (void *)get_l1_scratch_start_cpu(cpu) + reserve; |
| 84 | per_cpu(free_l1_ssram_head, cpu).next->size = L1_SCRATCH_LENGTH - reserve; |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 85 | per_cpu(free_l1_ssram_head, cpu).next->pid = 0; |
| 86 | per_cpu(free_l1_ssram_head, cpu).next->next = NULL; |
| 87 | |
| 88 | per_cpu(used_l1_ssram_head, cpu).next = NULL; |
| 89 | |
| 90 | /* mutex initialize */ |
| 91 | spin_lock_init(&per_cpu(l1sram_lock, cpu)); |
| 92 | printk(KERN_INFO "Blackfin Scratchpad data SRAM: %d KB\n", |
| 93 | L1_SCRATCH_LENGTH >> 10); |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 94 | } |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 95 | } |
| 96 | |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 97 | static void __init l1_data_sram_init(void) |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 98 | { |
Mike Frysinger | 0b82e27 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 99 | #if L1_DATA_A_LENGTH != 0 || L1_DATA_B_LENGTH != 0 |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 100 | unsigned int cpu; |
Mike Frysinger | 0b82e27 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 101 | #endif |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 102 | #if L1_DATA_A_LENGTH != 0 |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 103 | for (cpu = 0; cpu < num_possible_cpus(); ++cpu) { |
| 104 | per_cpu(free_l1_data_A_sram_head, cpu).next = |
| 105 | kmem_cache_alloc(sram_piece_cache, GFP_KERNEL); |
| 106 | if (!per_cpu(free_l1_data_A_sram_head, cpu).next) { |
| 107 | printk(KERN_INFO "Fail to initialize L1 Data A SRAM.\n"); |
| 108 | return; |
| 109 | } |
| 110 | |
| 111 | per_cpu(free_l1_data_A_sram_head, cpu).next->paddr = |
| 112 | (void *)get_l1_data_a_start_cpu(cpu) + (_ebss_l1 - _sdata_l1); |
| 113 | per_cpu(free_l1_data_A_sram_head, cpu).next->size = |
| 114 | L1_DATA_A_LENGTH - (_ebss_l1 - _sdata_l1); |
| 115 | per_cpu(free_l1_data_A_sram_head, cpu).next->pid = 0; |
| 116 | per_cpu(free_l1_data_A_sram_head, cpu).next->next = NULL; |
| 117 | |
| 118 | per_cpu(used_l1_data_A_sram_head, cpu).next = NULL; |
| 119 | |
| 120 | printk(KERN_INFO "Blackfin L1 Data A SRAM: %d KB (%d KB free)\n", |
| 121 | L1_DATA_A_LENGTH >> 10, |
| 122 | per_cpu(free_l1_data_A_sram_head, cpu).next->size >> 10); |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 123 | } |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 124 | #endif |
| 125 | #if L1_DATA_B_LENGTH != 0 |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 126 | for (cpu = 0; cpu < num_possible_cpus(); ++cpu) { |
| 127 | per_cpu(free_l1_data_B_sram_head, cpu).next = |
| 128 | kmem_cache_alloc(sram_piece_cache, GFP_KERNEL); |
| 129 | if (!per_cpu(free_l1_data_B_sram_head, cpu).next) { |
| 130 | printk(KERN_INFO "Fail to initialize L1 Data B SRAM.\n"); |
| 131 | return; |
| 132 | } |
| 133 | |
| 134 | per_cpu(free_l1_data_B_sram_head, cpu).next->paddr = |
| 135 | (void *)get_l1_data_b_start_cpu(cpu) + (_ebss_b_l1 - _sdata_b_l1); |
| 136 | per_cpu(free_l1_data_B_sram_head, cpu).next->size = |
| 137 | L1_DATA_B_LENGTH - (_ebss_b_l1 - _sdata_b_l1); |
| 138 | per_cpu(free_l1_data_B_sram_head, cpu).next->pid = 0; |
| 139 | per_cpu(free_l1_data_B_sram_head, cpu).next->next = NULL; |
| 140 | |
| 141 | per_cpu(used_l1_data_B_sram_head, cpu).next = NULL; |
| 142 | |
| 143 | printk(KERN_INFO "Blackfin L1 Data B SRAM: %d KB (%d KB free)\n", |
| 144 | L1_DATA_B_LENGTH >> 10, |
| 145 | per_cpu(free_l1_data_B_sram_head, cpu).next->size >> 10); |
| 146 | /* mutex initialize */ |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 147 | } |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 148 | #endif |
| 149 | |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 150 | #if L1_DATA_A_LENGTH != 0 || L1_DATA_B_LENGTH != 0 |
| 151 | for (cpu = 0; cpu < num_possible_cpus(); ++cpu) |
| 152 | spin_lock_init(&per_cpu(l1_data_sram_lock, cpu)); |
| 153 | #endif |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 154 | } |
| 155 | |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 156 | static void __init l1_inst_sram_init(void) |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 157 | { |
| 158 | #if L1_CODE_LENGTH != 0 |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 159 | unsigned int cpu; |
| 160 | for (cpu = 0; cpu < num_possible_cpus(); ++cpu) { |
| 161 | per_cpu(free_l1_inst_sram_head, cpu).next = |
| 162 | kmem_cache_alloc(sram_piece_cache, GFP_KERNEL); |
| 163 | if (!per_cpu(free_l1_inst_sram_head, cpu).next) { |
| 164 | printk(KERN_INFO "Failed to initialize L1 Instruction SRAM\n"); |
| 165 | return; |
| 166 | } |
| 167 | |
| 168 | per_cpu(free_l1_inst_sram_head, cpu).next->paddr = |
| 169 | (void *)get_l1_code_start_cpu(cpu) + (_etext_l1 - _stext_l1); |
| 170 | per_cpu(free_l1_inst_sram_head, cpu).next->size = |
| 171 | L1_CODE_LENGTH - (_etext_l1 - _stext_l1); |
| 172 | per_cpu(free_l1_inst_sram_head, cpu).next->pid = 0; |
| 173 | per_cpu(free_l1_inst_sram_head, cpu).next->next = NULL; |
| 174 | |
| 175 | per_cpu(used_l1_inst_sram_head, cpu).next = NULL; |
| 176 | |
| 177 | printk(KERN_INFO "Blackfin L1 Instruction SRAM: %d KB (%d KB free)\n", |
| 178 | L1_CODE_LENGTH >> 10, |
| 179 | per_cpu(free_l1_inst_sram_head, cpu).next->size >> 10); |
| 180 | |
| 181 | /* mutex initialize */ |
| 182 | spin_lock_init(&per_cpu(l1_inst_sram_lock, cpu)); |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 183 | } |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 184 | #endif |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 185 | } |
| 186 | |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 187 | static void __init l2_sram_init(void) |
| 188 | { |
Mike Frysinger | 07aa7be | 2008-08-13 16:16:11 +0800 | [diff] [blame] | 189 | #if L2_LENGTH != 0 |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 190 | free_l2_sram_head.next = |
| 191 | kmem_cache_alloc(sram_piece_cache, GFP_KERNEL); |
| 192 | if (!free_l2_sram_head.next) { |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 193 | printk(KERN_INFO "Fail to initialize L2 SRAM.\n"); |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 194 | return; |
| 195 | } |
| 196 | |
Jie Zhang | b2c2f30 | 2008-10-28 15:57:49 +0800 | [diff] [blame] | 197 | free_l2_sram_head.next->paddr = |
| 198 | (void *)L2_START + (_ebss_l2 - _stext_l2); |
| 199 | free_l2_sram_head.next->size = |
| 200 | L2_LENGTH - (_ebss_l2 - _stext_l2); |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 201 | free_l2_sram_head.next->pid = 0; |
| 202 | free_l2_sram_head.next->next = NULL; |
| 203 | |
| 204 | used_l2_sram_head.next = NULL; |
| 205 | |
| 206 | printk(KERN_INFO "Blackfin L2 SRAM: %d KB (%d KB free)\n", |
| 207 | L2_LENGTH >> 10, |
| 208 | free_l2_sram_head.next->size >> 10); |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 209 | |
| 210 | /* mutex initialize */ |
| 211 | spin_lock_init(&l2_sram_lock); |
Mike Frysinger | 81c969a | 2009-07-01 15:42:13 +0000 | [diff] [blame] | 212 | #endif |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 213 | } |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 214 | |
Graf Yang | c72aa07 | 2009-05-25 04:44:00 +0000 | [diff] [blame] | 215 | static int __init bfin_sram_init(void) |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 216 | { |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 217 | sram_piece_cache = kmem_cache_create("sram_piece_cache", |
| 218 | sizeof(struct sram_piece), |
| 219 | 0, SLAB_PANIC, NULL); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 220 | |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 221 | l1sram_init(); |
| 222 | l1_data_sram_init(); |
| 223 | l1_inst_sram_init(); |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 224 | l2_sram_init(); |
Graf Yang | c72aa07 | 2009-05-25 04:44:00 +0000 | [diff] [blame] | 225 | |
| 226 | return 0; |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 227 | } |
Graf Yang | c72aa07 | 2009-05-25 04:44:00 +0000 | [diff] [blame] | 228 | pure_initcall(bfin_sram_init); |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 229 | |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 230 | /* SRAM allocate function */ |
| 231 | static void *_sram_alloc(size_t size, struct sram_piece *pfree_head, |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 232 | struct sram_piece *pused_head) |
| 233 | { |
| 234 | struct sram_piece *pslot, *plast, *pavail; |
| 235 | |
| 236 | if (size <= 0 || !pfree_head || !pused_head) |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 237 | return NULL; |
| 238 | |
| 239 | /* Align the size */ |
| 240 | size = (size + 3) & ~3; |
| 241 | |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 242 | pslot = pfree_head->next; |
| 243 | plast = pfree_head; |
| 244 | |
| 245 | /* search an available piece slot */ |
| 246 | while (pslot != NULL && size > pslot->size) { |
| 247 | plast = pslot; |
| 248 | pslot = pslot->next; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 249 | } |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 250 | |
| 251 | if (!pslot) |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 252 | return NULL; |
| 253 | |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 254 | if (pslot->size == size) { |
| 255 | plast->next = pslot->next; |
| 256 | pavail = pslot; |
| 257 | } else { |
| 258 | pavail = kmem_cache_alloc(sram_piece_cache, GFP_KERNEL); |
| 259 | |
| 260 | if (!pavail) |
| 261 | return NULL; |
| 262 | |
| 263 | pavail->paddr = pslot->paddr; |
| 264 | pavail->size = size; |
| 265 | pslot->paddr += size; |
| 266 | pslot->size -= size; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 267 | } |
| 268 | |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 269 | pavail->pid = current->pid; |
| 270 | |
| 271 | pslot = pused_head->next; |
| 272 | plast = pused_head; |
| 273 | |
| 274 | /* insert new piece into used piece list !!! */ |
| 275 | while (pslot != NULL && pavail->paddr < pslot->paddr) { |
| 276 | plast = pslot; |
| 277 | pslot = pslot->next; |
| 278 | } |
| 279 | |
| 280 | pavail->next = pslot; |
| 281 | plast->next = pavail; |
| 282 | |
| 283 | return pavail->paddr; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 284 | } |
| 285 | |
| 286 | /* Allocate the largest available block. */ |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 287 | static void *_sram_alloc_max(struct sram_piece *pfree_head, |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 288 | struct sram_piece *pused_head, |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 289 | unsigned long *psize) |
| 290 | { |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 291 | struct sram_piece *pslot, *pmax; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 292 | |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 293 | if (!pfree_head || !pused_head) |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 294 | return NULL; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 295 | |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 296 | pmax = pslot = pfree_head->next; |
| 297 | |
| 298 | /* search an available piece slot */ |
| 299 | while (pslot != NULL) { |
| 300 | if (pslot->size > pmax->size) |
| 301 | pmax = pslot; |
| 302 | pslot = pslot->next; |
| 303 | } |
| 304 | |
| 305 | if (!pmax) |
| 306 | return NULL; |
| 307 | |
| 308 | *psize = pmax->size; |
| 309 | |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 310 | return _sram_alloc(*psize, pfree_head, pused_head); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 311 | } |
| 312 | |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 313 | /* SRAM free function */ |
| 314 | static int _sram_free(const void *addr, |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 315 | struct sram_piece *pfree_head, |
| 316 | struct sram_piece *pused_head) |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 317 | { |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 318 | struct sram_piece *pslot, *plast, *pavail; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 319 | |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 320 | if (!pfree_head || !pused_head) |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 321 | return -1; |
| 322 | |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 323 | /* search the relevant memory slot */ |
| 324 | pslot = pused_head->next; |
| 325 | plast = pused_head; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 326 | |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 327 | /* search an available piece slot */ |
| 328 | while (pslot != NULL && pslot->paddr != addr) { |
| 329 | plast = pslot; |
| 330 | pslot = pslot->next; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 331 | } |
| 332 | |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 333 | if (!pslot) |
| 334 | return -1; |
| 335 | |
| 336 | plast->next = pslot->next; |
| 337 | pavail = pslot; |
| 338 | pavail->pid = 0; |
| 339 | |
| 340 | /* insert free pieces back to the free list */ |
| 341 | pslot = pfree_head->next; |
| 342 | plast = pfree_head; |
| 343 | |
| 344 | while (pslot != NULL && addr > pslot->paddr) { |
| 345 | plast = pslot; |
| 346 | pslot = pslot->next; |
| 347 | } |
| 348 | |
| 349 | if (plast != pfree_head && plast->paddr + plast->size == pavail->paddr) { |
| 350 | plast->size += pavail->size; |
| 351 | kmem_cache_free(sram_piece_cache, pavail); |
| 352 | } else { |
Sonic Zhang | 225f7e1 | 2008-08-25 18:00:45 +0800 | [diff] [blame] | 353 | pavail->next = plast->next; |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 354 | plast->next = pavail; |
| 355 | plast = pavail; |
| 356 | } |
| 357 | |
| 358 | if (pslot && plast->paddr + plast->size == pslot->paddr) { |
| 359 | plast->size += pslot->size; |
| 360 | plast->next = pslot->next; |
| 361 | kmem_cache_free(sram_piece_cache, pslot); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 362 | } |
| 363 | |
| 364 | return 0; |
| 365 | } |
| 366 | |
| 367 | int sram_free(const void *addr) |
| 368 | { |
Robin Getz | 5e95320 | 2008-10-08 17:22:49 +0800 | [diff] [blame] | 369 | |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 370 | #if L1_CODE_LENGTH != 0 |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 371 | if (addr >= (void *)get_l1_code_start() |
| 372 | && addr < (void *)(get_l1_code_start() + L1_CODE_LENGTH)) |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 373 | return l1_inst_sram_free(addr); |
Robin Getz | 5e95320 | 2008-10-08 17:22:49 +0800 | [diff] [blame] | 374 | else |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 375 | #endif |
| 376 | #if L1_DATA_A_LENGTH != 0 |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 377 | if (addr >= (void *)get_l1_data_a_start() |
| 378 | && addr < (void *)(get_l1_data_a_start() + L1_DATA_A_LENGTH)) |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 379 | return l1_data_A_sram_free(addr); |
Robin Getz | 5e95320 | 2008-10-08 17:22:49 +0800 | [diff] [blame] | 380 | else |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 381 | #endif |
| 382 | #if L1_DATA_B_LENGTH != 0 |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 383 | if (addr >= (void *)get_l1_data_b_start() |
| 384 | && addr < (void *)(get_l1_data_b_start() + L1_DATA_B_LENGTH)) |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 385 | return l1_data_B_sram_free(addr); |
Robin Getz | 5e95320 | 2008-10-08 17:22:49 +0800 | [diff] [blame] | 386 | else |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 387 | #endif |
Mike Frysinger | 07aa7be | 2008-08-13 16:16:11 +0800 | [diff] [blame] | 388 | #if L2_LENGTH != 0 |
Robin Getz | 5e95320 | 2008-10-08 17:22:49 +0800 | [diff] [blame] | 389 | if (addr >= (void *)L2_START |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 390 | && addr < (void *)(L2_START + L2_LENGTH)) |
| 391 | return l2_sram_free(addr); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 392 | else |
Robin Getz | 5e95320 | 2008-10-08 17:22:49 +0800 | [diff] [blame] | 393 | #endif |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 394 | return -1; |
| 395 | } |
| 396 | EXPORT_SYMBOL(sram_free); |
| 397 | |
| 398 | void *l1_data_A_sram_alloc(size_t size) |
| 399 | { |
Mike Frysinger | 81c969a | 2009-07-01 15:42:13 +0000 | [diff] [blame] | 400 | #if L1_DATA_A_LENGTH != 0 |
Vegard Nossum | 226a6ec | 2008-08-28 17:28:46 +0800 | [diff] [blame] | 401 | unsigned long flags; |
Mike Frysinger | 81c969a | 2009-07-01 15:42:13 +0000 | [diff] [blame] | 402 | void *addr; |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 403 | unsigned int cpu; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 404 | |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 405 | cpu = get_cpu(); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 406 | /* add mutex operation */ |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 407 | spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 408 | |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 409 | addr = _sram_alloc(size, &per_cpu(free_l1_data_A_sram_head, cpu), |
| 410 | &per_cpu(used_l1_data_A_sram_head, cpu)); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 411 | |
| 412 | /* add mutex operation */ |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 413 | spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags); |
| 414 | put_cpu(); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 415 | |
| 416 | pr_debug("Allocated address in l1_data_A_sram_alloc is 0x%lx+0x%lx\n", |
| 417 | (long unsigned int)addr, size); |
| 418 | |
| 419 | return addr; |
Mike Frysinger | 81c969a | 2009-07-01 15:42:13 +0000 | [diff] [blame] | 420 | #else |
| 421 | return NULL; |
| 422 | #endif |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 423 | } |
| 424 | EXPORT_SYMBOL(l1_data_A_sram_alloc); |
| 425 | |
| 426 | int l1_data_A_sram_free(const void *addr) |
| 427 | { |
Mike Frysinger | 81c969a | 2009-07-01 15:42:13 +0000 | [diff] [blame] | 428 | #if L1_DATA_A_LENGTH != 0 |
Vegard Nossum | 226a6ec | 2008-08-28 17:28:46 +0800 | [diff] [blame] | 429 | unsigned long flags; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 430 | int ret; |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 431 | unsigned int cpu; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 432 | |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 433 | cpu = get_cpu(); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 434 | /* add mutex operation */ |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 435 | spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 436 | |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 437 | ret = _sram_free(addr, &per_cpu(free_l1_data_A_sram_head, cpu), |
| 438 | &per_cpu(used_l1_data_A_sram_head, cpu)); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 439 | |
| 440 | /* add mutex operation */ |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 441 | spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags); |
| 442 | put_cpu(); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 443 | |
| 444 | return ret; |
Mike Frysinger | 81c969a | 2009-07-01 15:42:13 +0000 | [diff] [blame] | 445 | #else |
| 446 | return -1; |
| 447 | #endif |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 448 | } |
| 449 | EXPORT_SYMBOL(l1_data_A_sram_free); |
| 450 | |
| 451 | void *l1_data_B_sram_alloc(size_t size) |
| 452 | { |
| 453 | #if L1_DATA_B_LENGTH != 0 |
Vegard Nossum | 226a6ec | 2008-08-28 17:28:46 +0800 | [diff] [blame] | 454 | unsigned long flags; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 455 | void *addr; |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 456 | unsigned int cpu; |
| 457 | |
| 458 | cpu = get_cpu(); |
| 459 | /* add mutex operation */ |
| 460 | spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags); |
| 461 | |
| 462 | addr = _sram_alloc(size, &per_cpu(free_l1_data_B_sram_head, cpu), |
| 463 | &per_cpu(used_l1_data_B_sram_head, cpu)); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 464 | |
| 465 | /* add mutex operation */ |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 466 | spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags); |
| 467 | put_cpu(); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 468 | |
| 469 | pr_debug("Allocated address in l1_data_B_sram_alloc is 0x%lx+0x%lx\n", |
| 470 | (long unsigned int)addr, size); |
| 471 | |
| 472 | return addr; |
| 473 | #else |
| 474 | return NULL; |
| 475 | #endif |
| 476 | } |
| 477 | EXPORT_SYMBOL(l1_data_B_sram_alloc); |
| 478 | |
| 479 | int l1_data_B_sram_free(const void *addr) |
| 480 | { |
| 481 | #if L1_DATA_B_LENGTH != 0 |
Vegard Nossum | 226a6ec | 2008-08-28 17:28:46 +0800 | [diff] [blame] | 482 | unsigned long flags; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 483 | int ret; |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 484 | unsigned int cpu; |
| 485 | |
| 486 | cpu = get_cpu(); |
| 487 | /* add mutex operation */ |
| 488 | spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags); |
| 489 | |
| 490 | ret = _sram_free(addr, &per_cpu(free_l1_data_B_sram_head, cpu), |
| 491 | &per_cpu(used_l1_data_B_sram_head, cpu)); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 492 | |
| 493 | /* add mutex operation */ |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 494 | spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags); |
| 495 | put_cpu(); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 496 | |
| 497 | return ret; |
| 498 | #else |
| 499 | return -1; |
| 500 | #endif |
| 501 | } |
| 502 | EXPORT_SYMBOL(l1_data_B_sram_free); |
| 503 | |
| 504 | void *l1_data_sram_alloc(size_t size) |
| 505 | { |
| 506 | void *addr = l1_data_A_sram_alloc(size); |
| 507 | |
| 508 | if (!addr) |
| 509 | addr = l1_data_B_sram_alloc(size); |
| 510 | |
| 511 | return addr; |
| 512 | } |
| 513 | EXPORT_SYMBOL(l1_data_sram_alloc); |
| 514 | |
| 515 | void *l1_data_sram_zalloc(size_t size) |
| 516 | { |
| 517 | void *addr = l1_data_sram_alloc(size); |
| 518 | |
| 519 | if (addr) |
| 520 | memset(addr, 0x00, size); |
| 521 | |
| 522 | return addr; |
| 523 | } |
| 524 | EXPORT_SYMBOL(l1_data_sram_zalloc); |
| 525 | |
| 526 | int l1_data_sram_free(const void *addr) |
| 527 | { |
| 528 | int ret; |
| 529 | ret = l1_data_A_sram_free(addr); |
| 530 | if (ret == -1) |
| 531 | ret = l1_data_B_sram_free(addr); |
| 532 | return ret; |
| 533 | } |
| 534 | EXPORT_SYMBOL(l1_data_sram_free); |
| 535 | |
| 536 | void *l1_inst_sram_alloc(size_t size) |
| 537 | { |
Meihui Fan | c5b50df | 2008-04-23 08:55:26 +0800 | [diff] [blame] | 538 | #if L1_CODE_LENGTH != 0 |
Vegard Nossum | 226a6ec | 2008-08-28 17:28:46 +0800 | [diff] [blame] | 539 | unsigned long flags; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 540 | void *addr; |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 541 | unsigned int cpu; |
| 542 | |
| 543 | cpu = get_cpu(); |
| 544 | /* add mutex operation */ |
| 545 | spin_lock_irqsave(&per_cpu(l1_inst_sram_lock, cpu), flags); |
| 546 | |
| 547 | addr = _sram_alloc(size, &per_cpu(free_l1_inst_sram_head, cpu), |
| 548 | &per_cpu(used_l1_inst_sram_head, cpu)); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 549 | |
| 550 | /* add mutex operation */ |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 551 | spin_unlock_irqrestore(&per_cpu(l1_inst_sram_lock, cpu), flags); |
| 552 | put_cpu(); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 553 | |
| 554 | pr_debug("Allocated address in l1_inst_sram_alloc is 0x%lx+0x%lx\n", |
| 555 | (long unsigned int)addr, size); |
| 556 | |
| 557 | return addr; |
| 558 | #else |
| 559 | return NULL; |
| 560 | #endif |
| 561 | } |
| 562 | EXPORT_SYMBOL(l1_inst_sram_alloc); |
| 563 | |
| 564 | int l1_inst_sram_free(const void *addr) |
| 565 | { |
| 566 | #if L1_CODE_LENGTH != 0 |
Vegard Nossum | 226a6ec | 2008-08-28 17:28:46 +0800 | [diff] [blame] | 567 | unsigned long flags; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 568 | int ret; |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 569 | unsigned int cpu; |
| 570 | |
| 571 | cpu = get_cpu(); |
| 572 | /* add mutex operation */ |
| 573 | spin_lock_irqsave(&per_cpu(l1_inst_sram_lock, cpu), flags); |
| 574 | |
| 575 | ret = _sram_free(addr, &per_cpu(free_l1_inst_sram_head, cpu), |
| 576 | &per_cpu(used_l1_inst_sram_head, cpu)); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 577 | |
| 578 | /* add mutex operation */ |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 579 | spin_unlock_irqrestore(&per_cpu(l1_inst_sram_lock, cpu), flags); |
| 580 | put_cpu(); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 581 | |
| 582 | return ret; |
| 583 | #else |
| 584 | return -1; |
| 585 | #endif |
| 586 | } |
| 587 | EXPORT_SYMBOL(l1_inst_sram_free); |
| 588 | |
| 589 | /* L1 Scratchpad memory allocate function */ |
| 590 | void *l1sram_alloc(size_t size) |
| 591 | { |
Vegard Nossum | 226a6ec | 2008-08-28 17:28:46 +0800 | [diff] [blame] | 592 | unsigned long flags; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 593 | void *addr; |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 594 | unsigned int cpu; |
| 595 | |
| 596 | cpu = get_cpu(); |
| 597 | /* add mutex operation */ |
| 598 | spin_lock_irqsave(&per_cpu(l1sram_lock, cpu), flags); |
| 599 | |
| 600 | addr = _sram_alloc(size, &per_cpu(free_l1_ssram_head, cpu), |
| 601 | &per_cpu(used_l1_ssram_head, cpu)); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 602 | |
| 603 | /* add mutex operation */ |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 604 | spin_unlock_irqrestore(&per_cpu(l1sram_lock, cpu), flags); |
| 605 | put_cpu(); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 606 | |
| 607 | return addr; |
| 608 | } |
| 609 | |
| 610 | /* L1 Scratchpad memory allocate function */ |
| 611 | void *l1sram_alloc_max(size_t *psize) |
| 612 | { |
Vegard Nossum | 226a6ec | 2008-08-28 17:28:46 +0800 | [diff] [blame] | 613 | unsigned long flags; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 614 | void *addr; |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 615 | unsigned int cpu; |
| 616 | |
| 617 | cpu = get_cpu(); |
| 618 | /* add mutex operation */ |
| 619 | spin_lock_irqsave(&per_cpu(l1sram_lock, cpu), flags); |
| 620 | |
| 621 | addr = _sram_alloc_max(&per_cpu(free_l1_ssram_head, cpu), |
| 622 | &per_cpu(used_l1_ssram_head, cpu), psize); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 623 | |
| 624 | /* add mutex operation */ |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 625 | spin_unlock_irqrestore(&per_cpu(l1sram_lock, cpu), flags); |
| 626 | put_cpu(); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 627 | |
| 628 | return addr; |
| 629 | } |
| 630 | |
| 631 | /* L1 Scratchpad memory free function */ |
| 632 | int l1sram_free(const void *addr) |
| 633 | { |
Vegard Nossum | 226a6ec | 2008-08-28 17:28:46 +0800 | [diff] [blame] | 634 | unsigned long flags; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 635 | int ret; |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 636 | unsigned int cpu; |
| 637 | |
| 638 | cpu = get_cpu(); |
| 639 | /* add mutex operation */ |
| 640 | spin_lock_irqsave(&per_cpu(l1sram_lock, cpu), flags); |
| 641 | |
| 642 | ret = _sram_free(addr, &per_cpu(free_l1_ssram_head, cpu), |
| 643 | &per_cpu(used_l1_ssram_head, cpu)); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 644 | |
| 645 | /* add mutex operation */ |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 646 | spin_unlock_irqrestore(&per_cpu(l1sram_lock, cpu), flags); |
| 647 | put_cpu(); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 648 | |
| 649 | return ret; |
| 650 | } |
| 651 | |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 652 | void *l2_sram_alloc(size_t size) |
| 653 | { |
Mike Frysinger | 07aa7be | 2008-08-13 16:16:11 +0800 | [diff] [blame] | 654 | #if L2_LENGTH != 0 |
Vegard Nossum | 226a6ec | 2008-08-28 17:28:46 +0800 | [diff] [blame] | 655 | unsigned long flags; |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 656 | void *addr; |
| 657 | |
| 658 | /* add mutex operation */ |
| 659 | spin_lock_irqsave(&l2_sram_lock, flags); |
| 660 | |
| 661 | addr = _sram_alloc(size, &free_l2_sram_head, |
| 662 | &used_l2_sram_head); |
| 663 | |
| 664 | /* add mutex operation */ |
| 665 | spin_unlock_irqrestore(&l2_sram_lock, flags); |
| 666 | |
| 667 | pr_debug("Allocated address in l2_sram_alloc is 0x%lx+0x%lx\n", |
| 668 | (long unsigned int)addr, size); |
| 669 | |
| 670 | return addr; |
| 671 | #else |
| 672 | return NULL; |
| 673 | #endif |
| 674 | } |
| 675 | EXPORT_SYMBOL(l2_sram_alloc); |
| 676 | |
| 677 | void *l2_sram_zalloc(size_t size) |
| 678 | { |
| 679 | void *addr = l2_sram_alloc(size); |
| 680 | |
| 681 | if (addr) |
| 682 | memset(addr, 0x00, size); |
| 683 | |
| 684 | return addr; |
| 685 | } |
| 686 | EXPORT_SYMBOL(l2_sram_zalloc); |
| 687 | |
| 688 | int l2_sram_free(const void *addr) |
| 689 | { |
Mike Frysinger | 07aa7be | 2008-08-13 16:16:11 +0800 | [diff] [blame] | 690 | #if L2_LENGTH != 0 |
Vegard Nossum | 226a6ec | 2008-08-28 17:28:46 +0800 | [diff] [blame] | 691 | unsigned long flags; |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 692 | int ret; |
| 693 | |
| 694 | /* add mutex operation */ |
| 695 | spin_lock_irqsave(&l2_sram_lock, flags); |
| 696 | |
| 697 | ret = _sram_free(addr, &free_l2_sram_head, |
| 698 | &used_l2_sram_head); |
| 699 | |
| 700 | /* add mutex operation */ |
| 701 | spin_unlock_irqrestore(&l2_sram_lock, flags); |
| 702 | |
| 703 | return ret; |
| 704 | #else |
| 705 | return -1; |
| 706 | #endif |
| 707 | } |
| 708 | EXPORT_SYMBOL(l2_sram_free); |
| 709 | |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 710 | int sram_free_with_lsl(const void *addr) |
| 711 | { |
| 712 | struct sram_list_struct *lsl, **tmp; |
| 713 | struct mm_struct *mm = current->mm; |
| 714 | |
| 715 | for (tmp = &mm->context.sram_list; *tmp; tmp = &(*tmp)->next) |
| 716 | if ((*tmp)->addr == addr) |
| 717 | goto found; |
| 718 | return -1; |
| 719 | found: |
| 720 | lsl = *tmp; |
| 721 | sram_free(addr); |
| 722 | *tmp = lsl->next; |
| 723 | kfree(lsl); |
| 724 | |
| 725 | return 0; |
| 726 | } |
| 727 | EXPORT_SYMBOL(sram_free_with_lsl); |
| 728 | |
Mike Frysinger | f1db88d | 2009-06-02 08:46:35 +0000 | [diff] [blame] | 729 | /* Allocate memory and keep in L1 SRAM List (lsl) so that the resources are |
| 730 | * tracked. These are designed for userspace so that when a process exits, |
| 731 | * we can safely reap their resources. |
| 732 | */ |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 733 | void *sram_alloc_with_lsl(size_t size, unsigned long flags) |
| 734 | { |
| 735 | void *addr = NULL; |
| 736 | struct sram_list_struct *lsl = NULL; |
| 737 | struct mm_struct *mm = current->mm; |
| 738 | |
Yoann Padioleau | dd00cc4 | 2007-07-19 01:49:03 -0700 | [diff] [blame] | 739 | lsl = kzalloc(sizeof(struct sram_list_struct), GFP_KERNEL); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 740 | if (!lsl) |
| 741 | return NULL; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 742 | |
| 743 | if (flags & L1_INST_SRAM) |
| 744 | addr = l1_inst_sram_alloc(size); |
| 745 | |
| 746 | if (addr == NULL && (flags & L1_DATA_A_SRAM)) |
| 747 | addr = l1_data_A_sram_alloc(size); |
| 748 | |
| 749 | if (addr == NULL && (flags & L1_DATA_B_SRAM)) |
| 750 | addr = l1_data_B_sram_alloc(size); |
| 751 | |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 752 | if (addr == NULL && (flags & L2_SRAM)) |
| 753 | addr = l2_sram_alloc(size); |
| 754 | |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 755 | if (addr == NULL) { |
| 756 | kfree(lsl); |
| 757 | return NULL; |
| 758 | } |
| 759 | lsl->addr = addr; |
| 760 | lsl->length = size; |
| 761 | lsl->next = mm->context.sram_list; |
| 762 | mm->context.sram_list = lsl; |
| 763 | return addr; |
| 764 | } |
| 765 | EXPORT_SYMBOL(sram_alloc_with_lsl); |
Mike Frysinger | bc61b4e | 2007-06-14 13:21:08 +0800 | [diff] [blame] | 766 | |
| 767 | #ifdef CONFIG_PROC_FS |
| 768 | /* Once we get a real allocator, we'll throw all of this away. |
| 769 | * Until then, we need some sort of visibility into the L1 alloc. |
| 770 | */ |
Mike Frysinger | 260d5d3 | 2008-07-14 16:34:05 +0800 | [diff] [blame] | 771 | /* Need to keep line of output the same. Currently, that is 44 bytes |
| 772 | * (including newline). |
| 773 | */ |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 774 | static int _sram_proc_read(char *buf, int *len, int count, const char *desc, |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 775 | struct sram_piece *pfree_head, |
| 776 | struct sram_piece *pused_head) |
Mike Frysinger | bc61b4e | 2007-06-14 13:21:08 +0800 | [diff] [blame] | 777 | { |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 778 | struct sram_piece *pslot; |
| 779 | |
| 780 | if (!pfree_head || !pused_head) |
| 781 | return -1; |
Mike Frysinger | bc61b4e | 2007-06-14 13:21:08 +0800 | [diff] [blame] | 782 | |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 783 | *len += sprintf(&buf[*len], "--- SRAM %-14s Size PID State \n", desc); |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 784 | |
| 785 | /* search the relevant memory slot */ |
| 786 | pslot = pused_head->next; |
| 787 | |
| 788 | while (pslot != NULL) { |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 789 | *len += sprintf(&buf[*len], "%p-%p %10i %5i %-10s\n", |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 790 | pslot->paddr, pslot->paddr + pslot->size, |
| 791 | pslot->size, pslot->pid, "ALLOCATED"); |
| 792 | |
| 793 | pslot = pslot->next; |
Mike Frysinger | bc61b4e | 2007-06-14 13:21:08 +0800 | [diff] [blame] | 794 | } |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 795 | |
| 796 | pslot = pfree_head->next; |
| 797 | |
| 798 | while (pslot != NULL) { |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 799 | *len += sprintf(&buf[*len], "%p-%p %10i %5i %-10s\n", |
Sonic Zhang | 5d481f4 | 2008-07-19 14:51:31 +0800 | [diff] [blame] | 800 | pslot->paddr, pslot->paddr + pslot->size, |
| 801 | pslot->size, pslot->pid, "FREE"); |
| 802 | |
| 803 | pslot = pslot->next; |
| 804 | } |
| 805 | |
| 806 | return 0; |
Mike Frysinger | bc61b4e | 2007-06-14 13:21:08 +0800 | [diff] [blame] | 807 | } |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 808 | static int sram_proc_read(char *buf, char **start, off_t offset, int count, |
Mike Frysinger | bc61b4e | 2007-06-14 13:21:08 +0800 | [diff] [blame] | 809 | int *eof, void *data) |
| 810 | { |
| 811 | int len = 0; |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 812 | unsigned int cpu; |
Mike Frysinger | bc61b4e | 2007-06-14 13:21:08 +0800 | [diff] [blame] | 813 | |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 814 | for (cpu = 0; cpu < num_possible_cpus(); ++cpu) { |
| 815 | if (_sram_proc_read(buf, &len, count, "Scratchpad", |
| 816 | &per_cpu(free_l1_ssram_head, cpu), &per_cpu(used_l1_ssram_head, cpu))) |
| 817 | goto not_done; |
Mike Frysinger | bc61b4e | 2007-06-14 13:21:08 +0800 | [diff] [blame] | 818 | #if L1_DATA_A_LENGTH != 0 |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 819 | if (_sram_proc_read(buf, &len, count, "L1 Data A", |
| 820 | &per_cpu(free_l1_data_A_sram_head, cpu), |
| 821 | &per_cpu(used_l1_data_A_sram_head, cpu))) |
| 822 | goto not_done; |
Mike Frysinger | bc61b4e | 2007-06-14 13:21:08 +0800 | [diff] [blame] | 823 | #endif |
| 824 | #if L1_DATA_B_LENGTH != 0 |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 825 | if (_sram_proc_read(buf, &len, count, "L1 Data B", |
| 826 | &per_cpu(free_l1_data_B_sram_head, cpu), |
| 827 | &per_cpu(used_l1_data_B_sram_head, cpu))) |
| 828 | goto not_done; |
Mike Frysinger | bc61b4e | 2007-06-14 13:21:08 +0800 | [diff] [blame] | 829 | #endif |
| 830 | #if L1_CODE_LENGTH != 0 |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 831 | if (_sram_proc_read(buf, &len, count, "L1 Instruction", |
| 832 | &per_cpu(free_l1_inst_sram_head, cpu), |
| 833 | &per_cpu(used_l1_inst_sram_head, cpu))) |
| 834 | goto not_done; |
Mike Frysinger | bc61b4e | 2007-06-14 13:21:08 +0800 | [diff] [blame] | 835 | #endif |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 836 | } |
Mike Frysinger | 07aa7be | 2008-08-13 16:16:11 +0800 | [diff] [blame] | 837 | #if L2_LENGTH != 0 |
Graf Yang | 8f65873 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 838 | if (_sram_proc_read(buf, &len, count, "L2", &free_l2_sram_head, |
| 839 | &used_l2_sram_head)) |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 840 | goto not_done; |
| 841 | #endif |
Mike Frysinger | 260d5d3 | 2008-07-14 16:34:05 +0800 | [diff] [blame] | 842 | *eof = 1; |
| 843 | not_done: |
Mike Frysinger | bc61b4e | 2007-06-14 13:21:08 +0800 | [diff] [blame] | 844 | return len; |
| 845 | } |
| 846 | |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 847 | static int __init sram_proc_init(void) |
Mike Frysinger | bc61b4e | 2007-06-14 13:21:08 +0800 | [diff] [blame] | 848 | { |
| 849 | struct proc_dir_entry *ptr; |
| 850 | ptr = create_proc_entry("sram", S_IFREG | S_IRUGO, NULL); |
| 851 | if (!ptr) { |
| 852 | printk(KERN_WARNING "unable to create /proc/sram\n"); |
| 853 | return -1; |
| 854 | } |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 855 | ptr->read_proc = sram_proc_read; |
Mike Frysinger | bc61b4e | 2007-06-14 13:21:08 +0800 | [diff] [blame] | 856 | return 0; |
| 857 | } |
Sonic Zhang | 262c382 | 2008-07-19 15:42:41 +0800 | [diff] [blame] | 858 | late_initcall(sram_proc_init); |
Mike Frysinger | bc61b4e | 2007-06-14 13:21:08 +0800 | [diff] [blame] | 859 | #endif |