From 5e95320f9fb7a3171bb75eba15acb745c6e43805 Mon Sep 17 00:00:00 2001 From: Robin Getz Date: Wed, 8 Oct 2008 17:22:49 +0800 Subject: Blackfin arch: rename blackfin_sram.c to sram-alloc.c rename blackfin_sram.c to sram-alloc.c (we know it is a blackfin file, since it is in arch/blackfin) - and there is no "driver" code in there, it is just an allocator/deallocator for L1 and L2 sram. Also fix a problem that checkpatch pointed out Signed-off-by: Robin Getz Signed-off-by: Bryan Wu --- arch/blackfin/mm/blackfin_sram.c | 806 --------------------------------------- 1 file changed, 806 deletions(-) delete mode 100644 arch/blackfin/mm/blackfin_sram.c (limited to 'arch/blackfin/mm/blackfin_sram.c') diff --git a/arch/blackfin/mm/blackfin_sram.c b/arch/blackfin/mm/blackfin_sram.c deleted file mode 100644 index 4f5e887a0d96..000000000000 --- a/arch/blackfin/mm/blackfin_sram.c +++ /dev/null @@ -1,806 +0,0 @@ -/* - * 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#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 -- cgit v1.2.3-59-g8ed1b