# arch/blackfin/mm/Makefile
#
-obj-y := blackfin_sram.o init.o
+obj-y := sram-alloc.o init.o
+++ /dev/null
-/*
- * File: arch/blackfin/mm/blackfin_sram.c
- * Based on:
- * Author:
- *
- * Created:
- * Description: SRAM driver for Blackfin ADSP-BF5xx
- *
- * Modified:
- * Copyright 2004-2007 Analog Devices Inc.
- *
- * Bugs: Enter bugs at http://blackfin.uclinux.org/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/ioport.h>
-#include <linux/fcntl.h>
-#include <linux/init.h>
-#include <linux/poll.h>
-#include <linux/proc_fs.h>
-#include <linux/spinlock.h>
-#include <linux/rtc.h>
-#include <asm/blackfin.h>
-#include "blackfin_sram.h"
-
-static spinlock_t l1sram_lock, l1_data_sram_lock, l1_inst_sram_lock;
-static spinlock_t l2_sram_lock;
-
-/* the data structure for L1 scratchpad and DATA SRAM */
-struct sram_piece {
- void *paddr;
- int size;
- pid_t pid;
- struct sram_piece *next;
-};
-
-static struct sram_piece free_l1_ssram_head, used_l1_ssram_head;
-
-#if L1_DATA_A_LENGTH != 0
-static struct sram_piece free_l1_data_A_sram_head, used_l1_data_A_sram_head;
-#endif
-
-#if L1_DATA_B_LENGTH != 0
-static struct sram_piece free_l1_data_B_sram_head, used_l1_data_B_sram_head;
-#endif
-
-#if L1_CODE_LENGTH != 0
-static struct sram_piece free_l1_inst_sram_head, used_l1_inst_sram_head;
-#endif
-
-#if L2_LENGTH != 0
-static struct sram_piece free_l2_sram_head, used_l2_sram_head;
-#endif
-
-static struct kmem_cache *sram_piece_cache;
-
-/* L1 Scratchpad SRAM initialization function */
-static void __init l1sram_init(void)
-{
- free_l1_ssram_head.next =
- kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
- if (!free_l1_ssram_head.next) {
- printk(KERN_INFO"Fail to initialize Scratchpad data SRAM.\n");
- return;
- }
-
- free_l1_ssram_head.next->paddr = (void *)L1_SCRATCH_START;
- free_l1_ssram_head.next->size = L1_SCRATCH_LENGTH;
- free_l1_ssram_head.next->pid = 0;
- free_l1_ssram_head.next->next = NULL;
-
- used_l1_ssram_head.next = NULL;
-
- /* mutex initialize */
- spin_lock_init(&l1sram_lock);
-
- printk(KERN_INFO "Blackfin Scratchpad data SRAM: %d KB\n",
- L1_SCRATCH_LENGTH >> 10);
-}
-
-static void __init l1_data_sram_init(void)
-{
-#if L1_DATA_A_LENGTH != 0
- free_l1_data_A_sram_head.next =
- kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
- if (!free_l1_data_A_sram_head.next) {
- printk(KERN_INFO"Fail to initialize L1 Data A SRAM.\n");
- return;
- }
-
- free_l1_data_A_sram_head.next->paddr =
- (void *)L1_DATA_A_START + (_ebss_l1 - _sdata_l1);
- free_l1_data_A_sram_head.next->size =
- L1_DATA_A_LENGTH - (_ebss_l1 - _sdata_l1);
- free_l1_data_A_sram_head.next->pid = 0;
- free_l1_data_A_sram_head.next->next = NULL;
-
- used_l1_data_A_sram_head.next = NULL;
-
- printk(KERN_INFO "Blackfin L1 Data A SRAM: %d KB (%d KB free)\n",
- L1_DATA_A_LENGTH >> 10,
- free_l1_data_A_sram_head.next->size >> 10);
-#endif
-#if L1_DATA_B_LENGTH != 0
- free_l1_data_B_sram_head.next =
- kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
- if (!free_l1_data_B_sram_head.next) {
- printk(KERN_INFO"Fail to initialize L1 Data B SRAM.\n");
- return;
- }
-
- free_l1_data_B_sram_head.next->paddr =
- (void *)L1_DATA_B_START + (_ebss_b_l1 - _sdata_b_l1);
- free_l1_data_B_sram_head.next->size =
- L1_DATA_B_LENGTH - (_ebss_b_l1 - _sdata_b_l1);
- free_l1_data_B_sram_head.next->pid = 0;
- free_l1_data_B_sram_head.next->next = NULL;
-
- used_l1_data_B_sram_head.next = NULL;
-
- printk(KERN_INFO "Blackfin L1 Data B SRAM: %d KB (%d KB free)\n",
- L1_DATA_B_LENGTH >> 10,
- free_l1_data_B_sram_head.next->size >> 10);
-#endif
-
- /* mutex initialize */
- spin_lock_init(&l1_data_sram_lock);
-}
-
-static void __init l1_inst_sram_init(void)
-{
-#if L1_CODE_LENGTH != 0
- free_l1_inst_sram_head.next =
- kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
- if (!free_l1_inst_sram_head.next) {
- printk(KERN_INFO"Fail to initialize L1 Instruction SRAM.\n");
- return;
- }
-
- free_l1_inst_sram_head.next->paddr =
- (void *)L1_CODE_START + (_etext_l1 - _stext_l1);
- free_l1_inst_sram_head.next->size =
- L1_CODE_LENGTH - (_etext_l1 - _stext_l1);
- free_l1_inst_sram_head.next->pid = 0;
- free_l1_inst_sram_head.next->next = NULL;
-
- used_l1_inst_sram_head.next = NULL;
-
- printk(KERN_INFO "Blackfin L1 Instruction SRAM: %d KB (%d KB free)\n",
- L1_CODE_LENGTH >> 10,
- free_l1_inst_sram_head.next->size >> 10);
-#endif
-
- /* mutex initialize */
- spin_lock_init(&l1_inst_sram_lock);
-}
-
-static void __init l2_sram_init(void)
-{
-#if L2_LENGTH != 0
- free_l2_sram_head.next =
- kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
- if (!free_l2_sram_head.next) {
- printk(KERN_INFO"Fail to initialize L2 SRAM.\n");
- return;
- }
-
- free_l2_sram_head.next->paddr = (void *)L2_START +
- (_etext_l2 - _stext_l2) + (_edata_l2 - _sdata_l2);
- free_l2_sram_head.next->size = L2_LENGTH -
- (_etext_l2 - _stext_l2) + (_edata_l2 - _sdata_l2);
- free_l2_sram_head.next->pid = 0;
- free_l2_sram_head.next->next = NULL;
-
- used_l2_sram_head.next = NULL;
-
- printk(KERN_INFO "Blackfin L2 SRAM: %d KB (%d KB free)\n",
- L2_LENGTH >> 10,
- free_l2_sram_head.next->size >> 10);
-#endif
-
- /* mutex initialize */
- spin_lock_init(&l2_sram_lock);
-}
-void __init bfin_sram_init(void)
-{
- sram_piece_cache = kmem_cache_create("sram_piece_cache",
- sizeof(struct sram_piece),
- 0, SLAB_PANIC, NULL);
-
- l1sram_init();
- l1_data_sram_init();
- l1_inst_sram_init();
- l2_sram_init();
-}
-
-/* SRAM allocate function */
-static void *_sram_alloc(size_t size, struct sram_piece *pfree_head,
- struct sram_piece *pused_head)
-{
- struct sram_piece *pslot, *plast, *pavail;
-
- if (size <= 0 || !pfree_head || !pused_head)
- return NULL;
-
- /* Align the size */
- size = (size + 3) & ~3;
-
- pslot = pfree_head->next;
- plast = pfree_head;
-
- /* search an available piece slot */
- while (pslot != NULL && size > pslot->size) {
- plast = pslot;
- pslot = pslot->next;
- }
-
- if (!pslot)
- return NULL;
-
- if (pslot->size == size) {
- plast->next = pslot->next;
- pavail = pslot;
- } else {
- pavail = kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
-
- if (!pavail)
- return NULL;
-
- pavail->paddr = pslot->paddr;
- pavail->size = size;
- pslot->paddr += size;
- pslot->size -= size;
- }
-
- pavail->pid = current->pid;
-
- pslot = pused_head->next;
- plast = pused_head;
-
- /* insert new piece into used piece list !!! */
- while (pslot != NULL && pavail->paddr < pslot->paddr) {
- plast = pslot;
- pslot = pslot->next;
- }
-
- pavail->next = pslot;
- plast->next = pavail;
-
- return pavail->paddr;
-}
-
-/* Allocate the largest available block. */
-static void *_sram_alloc_max(struct sram_piece *pfree_head,
- struct sram_piece *pused_head,
- unsigned long *psize)
-{
- struct sram_piece *pslot, *pmax;
-
- if (!pfree_head || !pused_head)
- return NULL;
-
- pmax = pslot = pfree_head->next;
-
- /* search an available piece slot */
- while (pslot != NULL) {
- if (pslot->size > pmax->size)
- pmax = pslot;
- pslot = pslot->next;
- }
-
- if (!pmax)
- return NULL;
-
- *psize = pmax->size;
-
- return _sram_alloc(*psize, pfree_head, pused_head);
-}
-
-/* SRAM free function */
-static int _sram_free(const void *addr,
- struct sram_piece *pfree_head,
- struct sram_piece *pused_head)
-{
- struct sram_piece *pslot, *plast, *pavail;
-
- if (!pfree_head || !pused_head)
- return -1;
-
- /* search the relevant memory slot */
- pslot = pused_head->next;
- plast = pused_head;
-
- /* search an available piece slot */
- while (pslot != NULL && pslot->paddr != addr) {
- plast = pslot;
- pslot = pslot->next;
- }
-
- if (!pslot)
- return -1;
-
- plast->next = pslot->next;
- pavail = pslot;
- pavail->pid = 0;
-
- /* insert free pieces back to the free list */
- pslot = pfree_head->next;
- plast = pfree_head;
-
- while (pslot != NULL && addr > pslot->paddr) {
- plast = pslot;
- pslot = pslot->next;
- }
-
- if (plast != pfree_head && plast->paddr + plast->size == pavail->paddr) {
- plast->size += pavail->size;
- kmem_cache_free(sram_piece_cache, pavail);
- } else {
- pavail->next = plast->next;
- plast->next = pavail;
- plast = pavail;
- }
-
- if (pslot && plast->paddr + plast->size == pslot->paddr) {
- plast->size += pslot->size;
- plast->next = pslot->next;
- kmem_cache_free(sram_piece_cache, pslot);
- }
-
- return 0;
-}
-
-int sram_free(const void *addr)
-{
- if (0) {}
-#if L1_CODE_LENGTH != 0
- else if (addr >= (void *)L1_CODE_START
- && addr < (void *)(L1_CODE_START + L1_CODE_LENGTH))
- return l1_inst_sram_free(addr);
-#endif
-#if L1_DATA_A_LENGTH != 0
- else if (addr >= (void *)L1_DATA_A_START
- && addr < (void *)(L1_DATA_A_START + L1_DATA_A_LENGTH))
- return l1_data_A_sram_free(addr);
-#endif
-#if L1_DATA_B_LENGTH != 0
- else if (addr >= (void *)L1_DATA_B_START
- && addr < (void *)(L1_DATA_B_START + L1_DATA_B_LENGTH))
- return l1_data_B_sram_free(addr);
-#endif
-#if L2_LENGTH != 0
- else if (addr >= (void *)L2_START
- && addr < (void *)(L2_START + L2_LENGTH))
- return l2_sram_free(addr);
-#endif
- else
- return -1;
-}
-EXPORT_SYMBOL(sram_free);
-
-void *l1_data_A_sram_alloc(size_t size)
-{
- unsigned long flags;
- void *addr = NULL;
-
- /* add mutex operation */
- spin_lock_irqsave(&l1_data_sram_lock, flags);
-
-#if L1_DATA_A_LENGTH != 0
- addr = _sram_alloc(size, &free_l1_data_A_sram_head,
- &used_l1_data_A_sram_head);
-#endif
-
- /* add mutex operation */
- spin_unlock_irqrestore(&l1_data_sram_lock, flags);
-
- pr_debug("Allocated address in l1_data_A_sram_alloc is 0x%lx+0x%lx\n",
- (long unsigned int)addr, size);
-
- return addr;
-}
-EXPORT_SYMBOL(l1_data_A_sram_alloc);
-
-int l1_data_A_sram_free(const void *addr)
-{
- unsigned long flags;
- int ret;
-
- /* add mutex operation */
- spin_lock_irqsave(&l1_data_sram_lock, flags);
-
-#if L1_DATA_A_LENGTH != 0
- ret = _sram_free(addr, &free_l1_data_A_sram_head,
- &used_l1_data_A_sram_head);
-#else
- ret = -1;
-#endif
-
- /* add mutex operation */
- spin_unlock_irqrestore(&l1_data_sram_lock, flags);
-
- return ret;
-}
-EXPORT_SYMBOL(l1_data_A_sram_free);
-
-void *l1_data_B_sram_alloc(size_t size)
-{
-#if L1_DATA_B_LENGTH != 0
- unsigned long flags;
- void *addr;
-
- /* add mutex operation */
- spin_lock_irqsave(&l1_data_sram_lock, flags);
-
- addr = _sram_alloc(size, &free_l1_data_B_sram_head,
- &used_l1_data_B_sram_head);
-
- /* add mutex operation */
- spin_unlock_irqrestore(&l1_data_sram_lock, flags);
-
- pr_debug("Allocated address in l1_data_B_sram_alloc is 0x%lx+0x%lx\n",
- (long unsigned int)addr, size);
-
- return addr;
-#else
- return NULL;
-#endif
-}
-EXPORT_SYMBOL(l1_data_B_sram_alloc);
-
-int l1_data_B_sram_free(const void *addr)
-{
-#if L1_DATA_B_LENGTH != 0
- unsigned long flags;
- int ret;
-
- /* add mutex operation */
- spin_lock_irqsave(&l1_data_sram_lock, flags);
-
- ret = _sram_free(addr, &free_l1_data_B_sram_head,
- &used_l1_data_B_sram_head);
-
- /* add mutex operation */
- spin_unlock_irqrestore(&l1_data_sram_lock, flags);
-
- return ret;
-#else
- return -1;
-#endif
-}
-EXPORT_SYMBOL(l1_data_B_sram_free);
-
-void *l1_data_sram_alloc(size_t size)
-{
- void *addr = l1_data_A_sram_alloc(size);
-
- if (!addr)
- addr = l1_data_B_sram_alloc(size);
-
- return addr;
-}
-EXPORT_SYMBOL(l1_data_sram_alloc);
-
-void *l1_data_sram_zalloc(size_t size)
-{
- void *addr = l1_data_sram_alloc(size);
-
- if (addr)
- memset(addr, 0x00, size);
-
- return addr;
-}
-EXPORT_SYMBOL(l1_data_sram_zalloc);
-
-int l1_data_sram_free(const void *addr)
-{
- int ret;
- ret = l1_data_A_sram_free(addr);
- if (ret == -1)
- ret = l1_data_B_sram_free(addr);
- return ret;
-}
-EXPORT_SYMBOL(l1_data_sram_free);
-
-void *l1_inst_sram_alloc(size_t size)
-{
-#if L1_CODE_LENGTH != 0
- unsigned long flags;
- void *addr;
-
- /* add mutex operation */
- spin_lock_irqsave(&l1_inst_sram_lock, flags);
-
- addr = _sram_alloc(size, &free_l1_inst_sram_head,
- &used_l1_inst_sram_head);
-
- /* add mutex operation */
- spin_unlock_irqrestore(&l1_inst_sram_lock, flags);
-
- pr_debug("Allocated address in l1_inst_sram_alloc is 0x%lx+0x%lx\n",
- (long unsigned int)addr, size);
-
- return addr;
-#else
- return NULL;
-#endif
-}
-EXPORT_SYMBOL(l1_inst_sram_alloc);
-
-int l1_inst_sram_free(const void *addr)
-{
-#if L1_CODE_LENGTH != 0
- unsigned long flags;
- int ret;
-
- /* add mutex operation */
- spin_lock_irqsave(&l1_inst_sram_lock, flags);
-
- ret = _sram_free(addr, &free_l1_inst_sram_head,
- &used_l1_inst_sram_head);
-
- /* add mutex operation */
- spin_unlock_irqrestore(&l1_inst_sram_lock, flags);
-
- return ret;
-#else
- return -1;
-#endif
-}
-EXPORT_SYMBOL(l1_inst_sram_free);
-
-/* L1 Scratchpad memory allocate function */
-void *l1sram_alloc(size_t size)
-{
- unsigned long flags;
- void *addr;
-
- /* add mutex operation */
- spin_lock_irqsave(&l1sram_lock, flags);
-
- addr = _sram_alloc(size, &free_l1_ssram_head,
- &used_l1_ssram_head);
-
- /* add mutex operation */
- spin_unlock_irqrestore(&l1sram_lock, flags);
-
- return addr;
-}
-
-/* L1 Scratchpad memory allocate function */
-void *l1sram_alloc_max(size_t *psize)
-{
- unsigned long flags;
- void *addr;
-
- /* add mutex operation */
- spin_lock_irqsave(&l1sram_lock, flags);
-
- addr = _sram_alloc_max(&free_l1_ssram_head,
- &used_l1_ssram_head, psize);
-
- /* add mutex operation */
- spin_unlock_irqrestore(&l1sram_lock, flags);
-
- return addr;
-}
-
-/* L1 Scratchpad memory free function */
-int l1sram_free(const void *addr)
-{
- unsigned long flags;
- int ret;
-
- /* add mutex operation */
- spin_lock_irqsave(&l1sram_lock, flags);
-
- ret = _sram_free(addr, &free_l1_ssram_head,
- &used_l1_ssram_head);
-
- /* add mutex operation */
- spin_unlock_irqrestore(&l1sram_lock, flags);
-
- return ret;
-}
-
-void *l2_sram_alloc(size_t size)
-{
-#if L2_LENGTH != 0
- unsigned long flags;
- void *addr;
-
- /* add mutex operation */
- spin_lock_irqsave(&l2_sram_lock, flags);
-
- addr = _sram_alloc(size, &free_l2_sram_head,
- &used_l2_sram_head);
-
- /* add mutex operation */
- spin_unlock_irqrestore(&l2_sram_lock, flags);
-
- pr_debug("Allocated address in l2_sram_alloc is 0x%lx+0x%lx\n",
- (long unsigned int)addr, size);
-
- return addr;
-#else
- return NULL;
-#endif
-}
-EXPORT_SYMBOL(l2_sram_alloc);
-
-void *l2_sram_zalloc(size_t size)
-{
- void *addr = l2_sram_alloc(size);
-
- if (addr)
- memset(addr, 0x00, size);
-
- return addr;
-}
-EXPORT_SYMBOL(l2_sram_zalloc);
-
-int l2_sram_free(const void *addr)
-{
-#if L2_LENGTH != 0
- unsigned long flags;
- int ret;
-
- /* add mutex operation */
- spin_lock_irqsave(&l2_sram_lock, flags);
-
- ret = _sram_free(addr, &free_l2_sram_head,
- &used_l2_sram_head);
-
- /* add mutex operation */
- spin_unlock_irqrestore(&l2_sram_lock, flags);
-
- return ret;
-#else
- return -1;
-#endif
-}
-EXPORT_SYMBOL(l2_sram_free);
-
-int sram_free_with_lsl(const void *addr)
-{
- struct sram_list_struct *lsl, **tmp;
- struct mm_struct *mm = current->mm;
-
- for (tmp = &mm->context.sram_list; *tmp; tmp = &(*tmp)->next)
- if ((*tmp)->addr == addr)
- goto found;
- return -1;
-found:
- lsl = *tmp;
- sram_free(addr);
- *tmp = lsl->next;
- kfree(lsl);
-
- return 0;
-}
-EXPORT_SYMBOL(sram_free_with_lsl);
-
-void *sram_alloc_with_lsl(size_t size, unsigned long flags)
-{
- void *addr = NULL;
- struct sram_list_struct *lsl = NULL;
- struct mm_struct *mm = current->mm;
-
- lsl = kzalloc(sizeof(struct sram_list_struct), GFP_KERNEL);
- if (!lsl)
- return NULL;
-
- if (flags & L1_INST_SRAM)
- addr = l1_inst_sram_alloc(size);
-
- if (addr == NULL && (flags & L1_DATA_A_SRAM))
- addr = l1_data_A_sram_alloc(size);
-
- if (addr == NULL && (flags & L1_DATA_B_SRAM))
- addr = l1_data_B_sram_alloc(size);
-
- if (addr == NULL && (flags & L2_SRAM))
- addr = l2_sram_alloc(size);
-
- if (addr == NULL) {
- kfree(lsl);
- return NULL;
- }
- lsl->addr = addr;
- lsl->length = size;
- lsl->next = mm->context.sram_list;
- mm->context.sram_list = lsl;
- return addr;
-}
-EXPORT_SYMBOL(sram_alloc_with_lsl);
-
-#ifdef CONFIG_PROC_FS
-/* Once we get a real allocator, we'll throw all of this away.
- * Until then, we need some sort of visibility into the L1 alloc.
- */
-/* Need to keep line of output the same. Currently, that is 44 bytes
- * (including newline).
- */
-static int _sram_proc_read(char *buf, int *len, int count, const char *desc,
- struct sram_piece *pfree_head,
- struct sram_piece *pused_head)
-{
- struct sram_piece *pslot;
-
- if (!pfree_head || !pused_head)
- return -1;
-
- *len += sprintf(&buf[*len], "--- SRAM %-14s Size PID State \n", desc);
-
- /* search the relevant memory slot */
- pslot = pused_head->next;
-
- while (pslot != NULL) {
- *len += sprintf(&buf[*len], "%p-%p %10i %5i %-10s\n",
- pslot->paddr, pslot->paddr + pslot->size,
- pslot->size, pslot->pid, "ALLOCATED");
-
- pslot = pslot->next;
- }
-
- pslot = pfree_head->next;
-
- while (pslot != NULL) {
- *len += sprintf(&buf[*len], "%p-%p %10i %5i %-10s\n",
- pslot->paddr, pslot->paddr + pslot->size,
- pslot->size, pslot->pid, "FREE");
-
- pslot = pslot->next;
- }
-
- return 0;
-}
-static int sram_proc_read(char *buf, char **start, off_t offset, int count,
- int *eof, void *data)
-{
- int len = 0;
-
- if (_sram_proc_read(buf, &len, count, "Scratchpad",
- &free_l1_ssram_head, &used_l1_ssram_head))
- goto not_done;
-#if L1_DATA_A_LENGTH != 0
- if (_sram_proc_read(buf, &len, count, "L1 Data A",
- &free_l1_data_A_sram_head,
- &used_l1_data_A_sram_head))
- goto not_done;
-#endif
-#if L1_DATA_B_LENGTH != 0
- if (_sram_proc_read(buf, &len, count, "L1 Data B",
- &free_l1_data_B_sram_head,
- &used_l1_data_B_sram_head))
- goto not_done;
-#endif
-#if L1_CODE_LENGTH != 0
- if (_sram_proc_read(buf, &len, count, "L1 Instruction",
- &free_l1_inst_sram_head, &used_l1_inst_sram_head))
- goto not_done;
-#endif
-#if L2_LENGTH != 0
- if (_sram_proc_read(buf, &len, count, "L2",
- &free_l2_sram_head, &used_l2_sram_head))
- goto not_done;
-#endif
-
- *eof = 1;
- not_done:
- return len;
-}
-
-static int __init sram_proc_init(void)
-{
- struct proc_dir_entry *ptr;
- ptr = create_proc_entry("sram", S_IFREG | S_IRUGO, NULL);
- if (!ptr) {
- printk(KERN_WARNING "unable to create /proc/sram\n");
- return -1;
- }
- ptr->owner = THIS_MODULE;
- ptr->read_proc = sram_proc_read;
- return 0;
-}
-late_initcall(sram_proc_init);
-#endif
--- /dev/null
+/*
+ * File: arch/blackfin/mm/sram-alloc.c
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description: SRAM allocator for Blackfin L1 and L2 memory
+ *
+ * Modified:
+ * Copyright 2004-2008 Analog Devices Inc.
+ *
+ * Bugs: Enter bugs at http://blackfin.uclinux.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/miscdevice.h>
+#include <linux/ioport.h>
+#include <linux/fcntl.h>
+#include <linux/init.h>
+#include <linux/poll.h>
+#include <linux/proc_fs.h>
+#include <linux/spinlock.h>
+#include <linux/rtc.h>
+#include <asm/blackfin.h>
+#include "blackfin_sram.h"
+
+static spinlock_t l1sram_lock, l1_data_sram_lock, l1_inst_sram_lock;
+static spinlock_t l2_sram_lock;
+
+/* the data structure for L1 scratchpad and DATA SRAM */
+struct sram_piece {
+ void *paddr;
+ int size;
+ pid_t pid;
+ struct sram_piece *next;
+};
+
+static struct sram_piece free_l1_ssram_head, used_l1_ssram_head;
+
+#if L1_DATA_A_LENGTH != 0
+static struct sram_piece free_l1_data_A_sram_head, used_l1_data_A_sram_head;
+#endif
+
+#if L1_DATA_B_LENGTH != 0
+static struct sram_piece free_l1_data_B_sram_head, used_l1_data_B_sram_head;
+#endif
+
+#if L1_CODE_LENGTH != 0
+static struct sram_piece free_l1_inst_sram_head, used_l1_inst_sram_head;
+#endif
+
+#if L2_LENGTH != 0
+static struct sram_piece free_l2_sram_head, used_l2_sram_head;
+#endif
+
+static struct kmem_cache *sram_piece_cache;
+
+/* L1 Scratchpad SRAM initialization function */
+static void __init l1sram_init(void)
+{
+ free_l1_ssram_head.next =
+ kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
+ if (!free_l1_ssram_head.next) {
+ printk(KERN_INFO "Failed to initialize Scratchpad data SRAM\n");
+ return;
+ }
+
+ free_l1_ssram_head.next->paddr = (void *)L1_SCRATCH_START;
+ free_l1_ssram_head.next->size = L1_SCRATCH_LENGTH;
+ free_l1_ssram_head.next->pid = 0;
+ free_l1_ssram_head.next->next = NULL;
+
+ used_l1_ssram_head.next = NULL;
+
+ /* mutex initialize */
+ spin_lock_init(&l1sram_lock);
+
+ printk(KERN_INFO "Blackfin Scratchpad data SRAM: %d KB\n",
+ L1_SCRATCH_LENGTH >> 10);
+}
+
+static void __init l1_data_sram_init(void)
+{
+#if L1_DATA_A_LENGTH != 0
+ free_l1_data_A_sram_head.next =
+ kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
+ if (!free_l1_data_A_sram_head.next) {
+ printk(KERN_INFO "Failed to initialize L1 Data A SRAM\n");
+ return;
+ }
+
+ free_l1_data_A_sram_head.next->paddr =
+ (void *)L1_DATA_A_START + (_ebss_l1 - _sdata_l1);
+ free_l1_data_A_sram_head.next->size =
+ L1_DATA_A_LENGTH - (_ebss_l1 - _sdata_l1);
+ free_l1_data_A_sram_head.next->pid = 0;
+ free_l1_data_A_sram_head.next->next = NULL;
+
+ used_l1_data_A_sram_head.next = NULL;
+
+ printk(KERN_INFO "Blackfin L1 Data A SRAM: %d KB (%d KB free)\n",
+ L1_DATA_A_LENGTH >> 10,
+ free_l1_data_A_sram_head.next->size >> 10);
+#endif
+#if L1_DATA_B_LENGTH != 0
+ free_l1_data_B_sram_head.next =
+ kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
+ if (!free_l1_data_B_sram_head.next) {
+ printk(KERN_INFO "Failed to initialize L1 Data B SRAM\n");
+ return;
+ }
+
+ free_l1_data_B_sram_head.next->paddr =
+ (void *)L1_DATA_B_START + (_ebss_b_l1 - _sdata_b_l1);
+ free_l1_data_B_sram_head.next->size =
+ L1_DATA_B_LENGTH - (_ebss_b_l1 - _sdata_b_l1);
+ free_l1_data_B_sram_head.next->pid = 0;
+ free_l1_data_B_sram_head.next->next = NULL;
+
+ used_l1_data_B_sram_head.next = NULL;
+
+ printk(KERN_INFO "Blackfin L1 Data B SRAM: %d KB (%d KB free)\n",
+ L1_DATA_B_LENGTH >> 10,
+ free_l1_data_B_sram_head.next->size >> 10);
+#endif
+
+ /* mutex initialize */
+ spin_lock_init(&l1_data_sram_lock);
+}
+
+static void __init l1_inst_sram_init(void)
+{
+#if L1_CODE_LENGTH != 0
+ free_l1_inst_sram_head.next =
+ kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
+ if (!free_l1_inst_sram_head.next) {
+ printk(KERN_INFO "Failed to initialize L1 Instruction SRAM\n");
+ return;
+ }
+
+ free_l1_inst_sram_head.next->paddr =
+ (void *)L1_CODE_START + (_etext_l1 - _stext_l1);
+ free_l1_inst_sram_head.next->size =
+ L1_CODE_LENGTH - (_etext_l1 - _stext_l1);
+ free_l1_inst_sram_head.next->pid = 0;
+ free_l1_inst_sram_head.next->next = NULL;
+
+ used_l1_inst_sram_head.next = NULL;
+
+ printk(KERN_INFO "Blackfin L1 Instruction SRAM: %d KB (%d KB free)\n",
+ L1_CODE_LENGTH >> 10,
+ free_l1_inst_sram_head.next->size >> 10);
+#endif
+
+ /* mutex initialize */
+ spin_lock_init(&l1_inst_sram_lock);
+}
+
+static void __init l2_sram_init(void)
+{
+#if L2_LENGTH != 0
+ free_l2_sram_head.next =
+ kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
+ if (!free_l2_sram_head.next) {
+ printk(KERN_INFO "Failed to initialize L2 SRAM\n");
+ return;
+ }
+
+ free_l2_sram_head.next->paddr = (void *)L2_START +
+ (_etext_l2 - _stext_l2) + (_edata_l2 - _sdata_l2);
+ free_l2_sram_head.next->size = L2_LENGTH -
+ (_etext_l2 - _stext_l2) + (_edata_l2 - _sdata_l2);
+ free_l2_sram_head.next->pid = 0;
+ free_l2_sram_head.next->next = NULL;
+
+ used_l2_sram_head.next = NULL;
+
+ printk(KERN_INFO "Blackfin L2 SRAM: %d KB (%d KB free)\n",
+ L2_LENGTH >> 10,
+ free_l2_sram_head.next->size >> 10);
+#endif
+
+ /* mutex initialize */
+ spin_lock_init(&l2_sram_lock);
+}
+void __init bfin_sram_init(void)
+{
+ sram_piece_cache = kmem_cache_create("sram_piece_cache",
+ sizeof(struct sram_piece),
+ 0, SLAB_PANIC, NULL);
+
+ l1sram_init();
+ l1_data_sram_init();
+ l1_inst_sram_init();
+ l2_sram_init();
+}
+
+/* SRAM allocate function */
+static void *_sram_alloc(size_t size, struct sram_piece *pfree_head,
+ struct sram_piece *pused_head)
+{
+ struct sram_piece *pslot, *plast, *pavail;
+
+ if (size <= 0 || !pfree_head || !pused_head)
+ return NULL;
+
+ /* Align the size */
+ size = (size + 3) & ~3;
+
+ pslot = pfree_head->next;
+ plast = pfree_head;
+
+ /* search an available piece slot */
+ while (pslot != NULL && size > pslot->size) {
+ plast = pslot;
+ pslot = pslot->next;
+ }
+
+ if (!pslot)
+ return NULL;
+
+ if (pslot->size == size) {
+ plast->next = pslot->next;
+ pavail = pslot;
+ } else {
+ pavail = kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
+
+ if (!pavail)
+ return NULL;
+
+ pavail->paddr = pslot->paddr;
+ pavail->size = size;
+ pslot->paddr += size;
+ pslot->size -= size;
+ }
+
+ pavail->pid = current->pid;
+
+ pslot = pused_head->next;
+ plast = pused_head;
+
+ /* insert new piece into used piece list !!! */
+ while (pslot != NULL && pavail->paddr < pslot->paddr) {
+ plast = pslot;
+ pslot = pslot->next;
+ }
+
+ pavail->next = pslot;
+ plast->next = pavail;
+
+ return pavail->paddr;
+}
+
+/* Allocate the largest available block. */
+static void *_sram_alloc_max(struct sram_piece *pfree_head,
+ struct sram_piece *pused_head,
+ unsigned long *psize)
+{
+ struct sram_piece *pslot, *pmax;
+
+ if (!pfree_head || !pused_head)
+ return NULL;
+
+ pmax = pslot = pfree_head->next;
+
+ /* search an available piece slot */
+ while (pslot != NULL) {
+ if (pslot->size > pmax->size)
+ pmax = pslot;
+ pslot = pslot->next;
+ }
+
+ if (!pmax)
+ return NULL;
+
+ *psize = pmax->size;
+
+ return _sram_alloc(*psize, pfree_head, pused_head);
+}
+
+/* SRAM free function */
+static int _sram_free(const void *addr,
+ struct sram_piece *pfree_head,
+ struct sram_piece *pused_head)
+{
+ struct sram_piece *pslot, *plast, *pavail;
+
+ if (!pfree_head || !pused_head)
+ return -1;
+
+ /* search the relevant memory slot */
+ pslot = pused_head->next;
+ plast = pused_head;
+
+ /* search an available piece slot */
+ while (pslot != NULL && pslot->paddr != addr) {
+ plast = pslot;
+ pslot = pslot->next;
+ }
+
+ if (!pslot)
+ return -1;
+
+ plast->next = pslot->next;
+ pavail = pslot;
+ pavail->pid = 0;
+
+ /* insert free pieces back to the free list */
+ pslot = pfree_head->next;
+ plast = pfree_head;
+
+ while (pslot != NULL && addr > pslot->paddr) {
+ plast = pslot;
+ pslot = pslot->next;
+ }
+
+ if (plast != pfree_head && plast->paddr + plast->size == pavail->paddr) {
+ plast->size += pavail->size;
+ kmem_cache_free(sram_piece_cache, pavail);
+ } else {
+ pavail->next = plast->next;
+ plast->next = pavail;
+ plast = pavail;
+ }
+
+ if (pslot && plast->paddr + plast->size == pslot->paddr) {
+ plast->size += pslot->size;
+ plast->next = pslot->next;
+ kmem_cache_free(sram_piece_cache, pslot);
+ }
+
+ return 0;
+}
+
+int sram_free(const void *addr)
+{
+
+#if L1_CODE_LENGTH != 0
+ if (addr >= (void *)L1_CODE_START
+ && addr < (void *)(L1_CODE_START + L1_CODE_LENGTH))
+ return l1_inst_sram_free(addr);
+ else
+#endif
+#if L1_DATA_A_LENGTH != 0
+ if (addr >= (void *)L1_DATA_A_START
+ && addr < (void *)(L1_DATA_A_START + L1_DATA_A_LENGTH))
+ return l1_data_A_sram_free(addr);
+ else
+#endif
+#if L1_DATA_B_LENGTH != 0
+ if (addr >= (void *)L1_DATA_B_START
+ && addr < (void *)(L1_DATA_B_START + L1_DATA_B_LENGTH))
+ return l1_data_B_sram_free(addr);
+ else
+#endif
+#if L2_LENGTH != 0
+ if (addr >= (void *)L2_START
+ && addr < (void *)(L2_START + L2_LENGTH))
+ return l2_sram_free(addr);
+ else
+#endif
+ return -1;
+}
+EXPORT_SYMBOL(sram_free);
+
+void *l1_data_A_sram_alloc(size_t size)
+{
+ unsigned long flags;
+ void *addr = NULL;
+
+ /* add mutex operation */
+ spin_lock_irqsave(&l1_data_sram_lock, flags);
+
+#if L1_DATA_A_LENGTH != 0
+ addr = _sram_alloc(size, &free_l1_data_A_sram_head,
+ &used_l1_data_A_sram_head);
+#endif
+
+ /* add mutex operation */
+ spin_unlock_irqrestore(&l1_data_sram_lock, flags);
+
+ pr_debug("Allocated address in l1_data_A_sram_alloc is 0x%lx+0x%lx\n",
+ (long unsigned int)addr, size);
+
+ return addr;
+}
+EXPORT_SYMBOL(l1_data_A_sram_alloc);
+
+int l1_data_A_sram_free(const void *addr)
+{
+ unsigned long flags;
+ int ret;
+
+ /* add mutex operation */
+ spin_lock_irqsave(&l1_data_sram_lock, flags);
+
+#if L1_DATA_A_LENGTH != 0
+ ret = _sram_free(addr, &free_l1_data_A_sram_head,
+ &used_l1_data_A_sram_head);
+#else
+ ret = -1;
+#endif
+
+ /* add mutex operation */
+ spin_unlock_irqrestore(&l1_data_sram_lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL(l1_data_A_sram_free);
+
+void *l1_data_B_sram_alloc(size_t size)
+{
+#if L1_DATA_B_LENGTH != 0
+ unsigned long flags;
+ void *addr;
+
+ /* add mutex operation */
+ spin_lock_irqsave(&l1_data_sram_lock, flags);
+
+ addr = _sram_alloc(size, &free_l1_data_B_sram_head,
+ &used_l1_data_B_sram_head);
+
+ /* add mutex operation */
+ spin_unlock_irqrestore(&l1_data_sram_lock, flags);
+
+ pr_debug("Allocated address in l1_data_B_sram_alloc is 0x%lx+0x%lx\n",
+ (long unsigned int)addr, size);
+
+ return addr;
+#else
+ return NULL;
+#endif
+}
+EXPORT_SYMBOL(l1_data_B_sram_alloc);
+
+int l1_data_B_sram_free(const void *addr)
+{
+#if L1_DATA_B_LENGTH != 0
+ unsigned long flags;
+ int ret;
+
+ /* add mutex operation */
+ spin_lock_irqsave(&l1_data_sram_lock, flags);
+
+ ret = _sram_free(addr, &free_l1_data_B_sram_head,
+ &used_l1_data_B_sram_head);
+
+ /* add mutex operation */
+ spin_unlock_irqrestore(&l1_data_sram_lock, flags);
+
+ return ret;
+#else
+ return -1;
+#endif
+}
+EXPORT_SYMBOL(l1_data_B_sram_free);
+
+void *l1_data_sram_alloc(size_t size)
+{
+ void *addr = l1_data_A_sram_alloc(size);
+
+ if (!addr)
+ addr = l1_data_B_sram_alloc(size);
+
+ return addr;
+}
+EXPORT_SYMBOL(l1_data_sram_alloc);
+
+void *l1_data_sram_zalloc(size_t size)
+{
+ void *addr = l1_data_sram_alloc(size);
+
+ if (addr)
+ memset(addr, 0x00, size);
+
+ return addr;
+}
+EXPORT_SYMBOL(l1_data_sram_zalloc);
+
+int l1_data_sram_free(const void *addr)
+{
+ int ret;
+ ret = l1_data_A_sram_free(addr);
+ if (ret == -1)
+ ret = l1_data_B_sram_free(addr);
+ return ret;
+}
+EXPORT_SYMBOL(l1_data_sram_free);
+
+void *l1_inst_sram_alloc(size_t size)
+{
+#if L1_CODE_LENGTH != 0
+ unsigned long flags;
+ void *addr;
+
+ /* add mutex operation */
+ spin_lock_irqsave(&l1_inst_sram_lock, flags);
+
+ addr = _sram_alloc(size, &free_l1_inst_sram_head,
+ &used_l1_inst_sram_head);
+
+ /* add mutex operation */
+ spin_unlock_irqrestore(&l1_inst_sram_lock, flags);
+
+ pr_debug("Allocated address in l1_inst_sram_alloc is 0x%lx+0x%lx\n",
+ (long unsigned int)addr, size);
+
+ return addr;
+#else
+ return NULL;
+#endif
+}
+EXPORT_SYMBOL(l1_inst_sram_alloc);
+
+int l1_inst_sram_free(const void *addr)
+{
+#if L1_CODE_LENGTH != 0
+ unsigned long flags;
+ int ret;
+
+ /* add mutex operation */
+ spin_lock_irqsave(&l1_inst_sram_lock, flags);
+
+ ret = _sram_free(addr, &free_l1_inst_sram_head,
+ &used_l1_inst_sram_head);
+
+ /* add mutex operation */
+ spin_unlock_irqrestore(&l1_inst_sram_lock, flags);
+
+ return ret;
+#else
+ return -1;
+#endif
+}
+EXPORT_SYMBOL(l1_inst_sram_free);
+
+/* L1 Scratchpad memory allocate function */
+void *l1sram_alloc(size_t size)
+{
+ unsigned long flags;
+ void *addr;
+
+ /* add mutex operation */
+ spin_lock_irqsave(&l1sram_lock, flags);
+
+ addr = _sram_alloc(size, &free_l1_ssram_head,
+ &used_l1_ssram_head);
+
+ /* add mutex operation */
+ spin_unlock_irqrestore(&l1sram_lock, flags);
+
+ return addr;
+}
+
+/* L1 Scratchpad memory allocate function */
+void *l1sram_alloc_max(size_t *psize)
+{
+ unsigned long flags;
+ void *addr;
+
+ /* add mutex operation */
+ spin_lock_irqsave(&l1sram_lock, flags);
+
+ addr = _sram_alloc_max(&free_l1_ssram_head,
+ &used_l1_ssram_head, psize);
+
+ /* add mutex operation */
+ spin_unlock_irqrestore(&l1sram_lock, flags);
+
+ return addr;
+}
+
+/* L1 Scratchpad memory free function */
+int l1sram_free(const void *addr)
+{
+ unsigned long flags;
+ int ret;
+
+ /* add mutex operation */
+ spin_lock_irqsave(&l1sram_lock, flags);
+
+ ret = _sram_free(addr, &free_l1_ssram_head,
+ &used_l1_ssram_head);
+
+ /* add mutex operation */
+ spin_unlock_irqrestore(&l1sram_lock, flags);
+
+ return ret;
+}
+
+void *l2_sram_alloc(size_t size)
+{
+#if L2_LENGTH != 0
+ unsigned long flags;
+ void *addr;
+
+ /* add mutex operation */
+ spin_lock_irqsave(&l2_sram_lock, flags);
+
+ addr = _sram_alloc(size, &free_l2_sram_head,
+ &used_l2_sram_head);
+
+ /* add mutex operation */
+ spin_unlock_irqrestore(&l2_sram_lock, flags);
+
+ pr_debug("Allocated address in l2_sram_alloc is 0x%lx+0x%lx\n",
+ (long unsigned int)addr, size);
+
+ return addr;
+#else
+ return NULL;
+#endif
+}
+EXPORT_SYMBOL(l2_sram_alloc);
+
+void *l2_sram_zalloc(size_t size)
+{
+ void *addr = l2_sram_alloc(size);
+
+ if (addr)
+ memset(addr, 0x00, size);
+
+ return addr;
+}
+EXPORT_SYMBOL(l2_sram_zalloc);
+
+int l2_sram_free(const void *addr)
+{
+#if L2_LENGTH != 0
+ unsigned long flags;
+ int ret;
+
+ /* add mutex operation */
+ spin_lock_irqsave(&l2_sram_lock, flags);
+
+ ret = _sram_free(addr, &free_l2_sram_head,
+ &used_l2_sram_head);
+
+ /* add mutex operation */
+ spin_unlock_irqrestore(&l2_sram_lock, flags);
+
+ return ret;
+#else
+ return -1;
+#endif
+}
+EXPORT_SYMBOL(l2_sram_free);
+
+int sram_free_with_lsl(const void *addr)
+{
+ struct sram_list_struct *lsl, **tmp;
+ struct mm_struct *mm = current->mm;
+
+ for (tmp = &mm->context.sram_list; *tmp; tmp = &(*tmp)->next)
+ if ((*tmp)->addr == addr)
+ goto found;
+ return -1;
+found:
+ lsl = *tmp;
+ sram_free(addr);
+ *tmp = lsl->next;
+ kfree(lsl);
+
+ return 0;
+}
+EXPORT_SYMBOL(sram_free_with_lsl);
+
+void *sram_alloc_with_lsl(size_t size, unsigned long flags)
+{
+ void *addr = NULL;
+ struct sram_list_struct *lsl = NULL;
+ struct mm_struct *mm = current->mm;
+
+ lsl = kzalloc(sizeof(struct sram_list_struct), GFP_KERNEL);
+ if (!lsl)
+ return NULL;
+
+ if (flags & L1_INST_SRAM)
+ addr = l1_inst_sram_alloc(size);
+
+ if (addr == NULL && (flags & L1_DATA_A_SRAM))
+ addr = l1_data_A_sram_alloc(size);
+
+ if (addr == NULL && (flags & L1_DATA_B_SRAM))
+ addr = l1_data_B_sram_alloc(size);
+
+ if (addr == NULL && (flags & L2_SRAM))
+ addr = l2_sram_alloc(size);
+
+ if (addr == NULL) {
+ kfree(lsl);
+ return NULL;
+ }
+ lsl->addr = addr;
+ lsl->length = size;
+ lsl->next = mm->context.sram_list;
+ mm->context.sram_list = lsl;
+ return addr;
+}
+EXPORT_SYMBOL(sram_alloc_with_lsl);
+
+#ifdef CONFIG_PROC_FS
+/* Once we get a real allocator, we'll throw all of this away.
+ * Until then, we need some sort of visibility into the L1 alloc.
+ */
+/* Need to keep line of output the same. Currently, that is 44 bytes
+ * (including newline).
+ */
+static int _sram_proc_read(char *buf, int *len, int count, const char *desc,
+ struct sram_piece *pfree_head,
+ struct sram_piece *pused_head)
+{
+ struct sram_piece *pslot;
+
+ if (!pfree_head || !pused_head)
+ return -1;
+
+ *len += sprintf(&buf[*len], "--- SRAM %-14s Size PID State \n", desc);
+
+ /* search the relevant memory slot */
+ pslot = pused_head->next;
+
+ while (pslot != NULL) {
+ *len += sprintf(&buf[*len], "%p-%p %10i %5i %-10s\n",
+ pslot->paddr, pslot->paddr + pslot->size,
+ pslot->size, pslot->pid, "ALLOCATED");
+
+ pslot = pslot->next;
+ }
+
+ pslot = pfree_head->next;
+
+ while (pslot != NULL) {
+ *len += sprintf(&buf[*len], "%p-%p %10i %5i %-10s\n",
+ pslot->paddr, pslot->paddr + pslot->size,
+ pslot->size, pslot->pid, "FREE");
+
+ pslot = pslot->next;
+ }
+
+ return 0;
+}
+static int sram_proc_read(char *buf, char **start, off_t offset, int count,
+ int *eof, void *data)
+{
+ int len = 0;
+
+ if (_sram_proc_read(buf, &len, count, "Scratchpad",
+ &free_l1_ssram_head, &used_l1_ssram_head))
+ goto not_done;
+#if L1_DATA_A_LENGTH != 0
+ if (_sram_proc_read(buf, &len, count, "L1 Data A",
+ &free_l1_data_A_sram_head,
+ &used_l1_data_A_sram_head))
+ goto not_done;
+#endif
+#if L1_DATA_B_LENGTH != 0
+ if (_sram_proc_read(buf, &len, count, "L1 Data B",
+ &free_l1_data_B_sram_head,
+ &used_l1_data_B_sram_head))
+ goto not_done;
+#endif
+#if L1_CODE_LENGTH != 0
+ if (_sram_proc_read(buf, &len, count, "L1 Instruction",
+ &free_l1_inst_sram_head, &used_l1_inst_sram_head))
+ goto not_done;
+#endif
+#if L2_LENGTH != 0
+ if (_sram_proc_read(buf, &len, count, "L2",
+ &free_l2_sram_head, &used_l2_sram_head))
+ goto not_done;
+#endif
+
+ *eof = 1;
+ not_done:
+ return len;
+}
+
+static int __init sram_proc_init(void)
+{
+ struct proc_dir_entry *ptr;
+ ptr = create_proc_entry("sram", S_IFREG | S_IRUGO, NULL);
+ if (!ptr) {
+ printk(KERN_WARNING "unable to create /proc/sram\n");
+ return -1;
+ }
+ ptr->owner = THIS_MODULE;
+ ptr->read_proc = sram_proc_read;
+ return 0;
+}
+late_initcall(sram_proc_init);
+#endif
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff