diff options
Diffstat (limited to 'arch/blackfin/mm/sram-alloc.c')
| -rw-r--r-- | arch/blackfin/mm/sram-alloc.c | 899 |
1 files changed, 0 insertions, 899 deletions
diff --git a/arch/blackfin/mm/sram-alloc.c b/arch/blackfin/mm/sram-alloc.c deleted file mode 100644 index d2a96c2..0000000 --- a/arch/blackfin/mm/sram-alloc.c +++ /dev/null @@ -1,899 +0,0 @@ -/* - * SRAM allocator for Blackfin on-chip memory - * - * Copyright 2004-2009 Analog Devices Inc. - * - * Licensed under the GPL-2 or later. - */ - -#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/seq_file.h> -#include <linux/spinlock.h> -#include <linux/rtc.h> -#include <linux/slab.h> -#include <linux/mm_types.h> - -#include <asm/blackfin.h> -#include <asm/mem_map.h> -#include "blackfin_sram.h" - -/* the data structure for L1 scratchpad and DATA SRAM */ -struct sram_piece { - void *paddr; - int size; - pid_t pid; - struct sram_piece *next; -}; - -static DEFINE_PER_CPU_SHARED_ALIGNED(spinlock_t, l1sram_lock); -static DEFINE_PER_CPU(struct sram_piece, free_l1_ssram_head); -static DEFINE_PER_CPU(struct sram_piece, used_l1_ssram_head); - -#if L1_DATA_A_LENGTH != 0 -static DEFINE_PER_CPU(struct sram_piece, free_l1_data_A_sram_head); -static DEFINE_PER_CPU(struct sram_piece, used_l1_data_A_sram_head); -#endif - -#if L1_DATA_B_LENGTH != 0 -static DEFINE_PER_CPU(struct sram_piece, free_l1_data_B_sram_head); -static DEFINE_PER_CPU(struct sram_piece, used_l1_data_B_sram_head); -#endif - -#if L1_DATA_A_LENGTH || L1_DATA_B_LENGTH -static DEFINE_PER_CPU_SHARED_ALIGNED(spinlock_t, l1_data_sram_lock); -#endif - -#if L1_CODE_LENGTH != 0 -static DEFINE_PER_CPU_SHARED_ALIGNED(spinlock_t, l1_inst_sram_lock); -static DEFINE_PER_CPU(struct sram_piece, free_l1_inst_sram_head); -static DEFINE_PER_CPU(struct sram_piece, used_l1_inst_sram_head); -#endif - -#if L2_LENGTH != 0 -static spinlock_t l2_sram_lock ____cacheline_aligned_in_smp; -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) -{ - unsigned int cpu; - unsigned long reserve; - -#ifdef CONFIG_SMP - reserve = 0; -#else - reserve = sizeof(struct l1_scratch_task_info); -#endif - - for (cpu = 0; cpu < num_possible_cpus(); ++cpu) { - per_cpu(free_l1_ssram_head, cpu).next = - kmem_cache_alloc(sram_piece_cache, GFP_KERNEL); - if (!per_cpu(free_l1_ssram_head, cpu).next) { - printk(KERN_INFO "Fail to initialize Scratchpad data SRAM.\n"); - return; - } - - per_cpu(free_l1_ssram_head, cpu).next->paddr = (void *)get_l1_scratch_start_cpu(cpu) + reserve; - per_cpu(free_l1_ssram_head, cpu).next->size = L1_SCRATCH_LENGTH - reserve; - per_cpu(free_l1_ssram_head, cpu).next->pid = 0; - per_cpu(free_l1_ssram_head, cpu).next->next = NULL; - - per_cpu(used_l1_ssram_head, cpu).next = NULL; - - /* mutex initialize */ - spin_lock_init(&per_cpu(l1sram_lock, cpu)); - 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 || L1_DATA_B_LENGTH != 0 - unsigned int cpu; -#endif -#if L1_DATA_A_LENGTH != 0 - for (cpu = 0; cpu < num_possible_cpus(); ++cpu) { - per_cpu(free_l1_data_A_sram_head, cpu).next = - kmem_cache_alloc(sram_piece_cache, GFP_KERNEL); - if (!per_cpu(free_l1_data_A_sram_head, cpu).next) { - printk(KERN_INFO "Fail to initialize L1 Data A SRAM.\n"); - return; - } - - per_cpu(free_l1_data_A_sram_head, cpu).next->paddr = - (void *)get_l1_data_a_start_cpu(cpu) + (_ebss_l1 - _sdata_l1); - per_cpu(free_l1_data_A_sram_head, cpu).next->size = - L1_DATA_A_LENGTH - (_ebss_l1 - _sdata_l1); - per_cpu(free_l1_data_A_sram_head, cpu).next->pid = 0; - per_cpu(free_l1_data_A_sram_head, cpu).next->next = NULL; - - per_cpu(used_l1_data_A_sram_head, cpu).next = NULL; - - printk(KERN_INFO "Blackfin L1 Data A SRAM: %d KB (%d KB free)\n", - L1_DATA_A_LENGTH >> 10, - per_cpu(free_l1_data_A_sram_head, cpu).next->size >> 10); - } -#endif -#if L1_DATA_B_LENGTH != 0 - for (cpu = 0; cpu < num_possible_cpus(); ++cpu) { - per_cpu(free_l1_data_B_sram_head, cpu).next = - kmem_cache_alloc(sram_piece_cache, GFP_KERNEL); - if (!per_cpu(free_l1_data_B_sram_head, cpu).next) { - printk(KERN_INFO "Fail to initialize L1 Data B SRAM.\n"); - return; - } - - per_cpu(free_l1_data_B_sram_head, cpu).next->paddr = - (void *)get_l1_data_b_start_cpu(cpu) + (_ebss_b_l1 - _sdata_b_l1); - per_cpu(free_l1_data_B_sram_head, cpu).next->size = - L1_DATA_B_LENGTH - (_ebss_b_l1 - _sdata_b_l1); - per_cpu(free_l1_data_B_sram_head, cpu).next->pid = 0; - per_cpu(free_l1_data_B_sram_head, cpu).next->next = NULL; - - per_cpu(used_l1_data_B_sram_head, cpu).next = NULL; - - printk(KERN_INFO "Blackfin L1 Data B SRAM: %d KB (%d KB free)\n", - L1_DATA_B_LENGTH >> 10, - per_cpu(free_l1_data_B_sram_head, cpu).next->size >> 10); - /* mutex initialize */ - } -#endif - -#if L1_DATA_A_LENGTH != 0 || L1_DATA_B_LENGTH != 0 - for (cpu = 0; cpu < num_possible_cpus(); ++cpu) - spin_lock_init(&per_cpu(l1_data_sram_lock, cpu)); -#endif -} - -static void __init l1_inst_sram_init(void) -{ -#if L1_CODE_LENGTH != 0 - unsigned int cpu; - for (cpu = 0; cpu < num_possible_cpus(); ++cpu) { - per_cpu(free_l1_inst_sram_head, cpu).next = - kmem_cache_alloc(sram_piece_cache, GFP_KERNEL); - if (!per_cpu(free_l1_inst_sram_head, cpu).next) { - printk(KERN_INFO "Failed to initialize L1 Instruction SRAM\n"); - return; - } - - per_cpu(free_l1_inst_sram_head, cpu).next->paddr = - (void *)get_l1_code_start_cpu(cpu) + (_etext_l1 - _stext_l1); - per_cpu(free_l1_inst_sram_head, cpu).next->size = - L1_CODE_LENGTH - (_etext_l1 - _stext_l1); - per_cpu(free_l1_inst_sram_head, cpu).next->pid = 0; - per_cpu(free_l1_inst_sram_head, cpu).next->next = NULL; - - per_cpu(used_l1_inst_sram_head, cpu).next = NULL; - - printk(KERN_INFO "Blackfin L1 Instruction SRAM: %d KB (%d KB free)\n", - L1_CODE_LENGTH >> 10, - per_cpu(free_l1_inst_sram_head, cpu).next->size >> 10); - - /* mutex initialize */ - spin_lock_init(&per_cpu(l1_inst_sram_lock, cpu)); - } -#endif -} - -#ifdef __ADSPBF60x__ -static irqreturn_t l2_ecc_err(int irq, void *dev_id) -{ - int status; - - printk(KERN_ERR "L2 ecc error happened\n"); - status = bfin_read32(L2CTL0_STAT); - if (status & 0x1) - printk(KERN_ERR "Core channel error type:0x%x, addr:0x%x\n", - bfin_read32(L2CTL0_ET0), bfin_read32(L2CTL0_EADDR0)); - if (status & 0x2) - printk(KERN_ERR "System channel error type:0x%x, addr:0x%x\n", - bfin_read32(L2CTL0_ET1), bfin_read32(L2CTL0_EADDR1)); - - status = status >> 8; - if (status) - printk(KERN_ERR "L2 Bank%d error, addr:0x%x\n", - status, bfin_read32(L2CTL0_ERRADDR0 + status)); - - panic("L2 Ecc error"); - return IRQ_HANDLED; -} -#endif - -static void __init l2_sram_init(void) -{ -#if L2_LENGTH != 0 - -#ifdef __ADSPBF60x__ - int ret; - - ret = request_irq(IRQ_L2CTL0_ECC_ERR, l2_ecc_err, 0, "l2-ecc-err", - NULL); - if (unlikely(ret < 0)) { - printk(KERN_INFO "Fail to request l2 ecc error interrupt"); - return; - } -#endif - - 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 + (_ebss_l2 - _stext_l2); - free_l2_sram_head.next->size = - L2_LENGTH - (_ebss_l2 - _stext_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); - - /* mutex initialize */ - spin_lock_init(&l2_sram_lock); -#endif -} - -static int __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(); - - return 0; -} -pure_initcall(bfin_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 { - /* use atomic so our L1 allocator can be used atomically */ - pavail = kmem_cache_alloc(sram_piece_cache, GFP_ATOMIC); - - 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 *)get_l1_code_start() - && addr < (void *)(get_l1_code_start() + L1_CODE_LENGTH)) - return l1_inst_sram_free(addr); - else -#endif -#if L1_DATA_A_LENGTH != 0 - if (addr >= (void *)get_l1_data_a_start() - && addr < (void *)(get_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 *)get_l1_data_b_start() - && addr < (void *)(get_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) -{ -#if L1_DATA_A_LENGTH != 0 - unsigned long flags; - void *addr; - unsigned int cpu; - - cpu = smp_processor_id(); - /* add mutex operation */ - spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags); - - addr = _sram_alloc(size, &per_cpu(free_l1_data_A_sram_head, cpu), - &per_cpu(used_l1_data_A_sram_head, cpu)); - - /* add mutex operation */ - spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags); - - pr_debug("Allocated address in l1_data_A_sram_alloc is 0x%lx+0x%lx\n", - (long unsigned int)addr, size); - - return addr; -#else - return NULL; -#endif -} -EXPORT_SYMBOL(l1_data_A_sram_alloc); - -int l1_data_A_sram_free(const void *addr) -{ -#if L1_DATA_A_LENGTH != 0 - unsigned long flags; - int ret; - unsigned int cpu; - - cpu = smp_processor_id(); - /* add mutex operation */ - spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags); - - ret = _sram_free(addr, &per_cpu(free_l1_data_A_sram_head, cpu), - &per_cpu(used_l1_data_A_sram_head, cpu)); - - /* add mutex operation */ - spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags); - - return ret; -#else - return -1; -#endif -} -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; - unsigned int cpu; - - cpu = smp_processor_id(); - /* add mutex operation */ - spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags); - - addr = _sram_alloc(size, &per_cpu(free_l1_data_B_sram_head, cpu), - &per_cpu(used_l1_data_B_sram_head, cpu)); - - /* add mutex operation */ - spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), 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; - unsigned int cpu; - - cpu = smp_processor_id(); - /* add mutex operation */ - spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags); - - ret = _sram_free(addr, &per_cpu(free_l1_data_B_sram_head, cpu), - &per_cpu(used_l1_data_B_sram_head, cpu)); - - /* add mutex operation */ - spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), 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; - unsigned int cpu; - - cpu = smp_processor_id(); - /* add mutex operation */ - spin_lock_irqsave(&per_cpu(l1_inst_sram_lock, cpu), flags); - - addr = _sram_alloc(size, &per_cpu(free_l1_inst_sram_head, cpu), - &per_cpu(used_l1_inst_sram_head, cpu)); - - /* add mutex operation */ - spin_unlock_irqrestore(&per_cpu(l1_inst_sram_lock, cpu), 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; - unsigned int cpu; - - cpu = smp_processor_id(); - /* add mutex operation */ - spin_lock_irqsave(&per_cpu(l1_inst_sram_lock, cpu), flags); - - ret = _sram_free(addr, &per_cpu(free_l1_inst_sram_head, cpu), - &per_cpu(used_l1_inst_sram_head, cpu)); - - /* add mutex operation */ - spin_unlock_irqrestore(&per_cpu(l1_inst_sram_lock, cpu), 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; - unsigned int cpu; - - cpu = smp_processor_id(); - /* add mutex operation */ - spin_lock_irqsave(&per_cpu(l1sram_lock, cpu), flags); - - addr = _sram_alloc(size, &per_cpu(free_l1_ssram_head, cpu), - &per_cpu(used_l1_ssram_head, cpu)); - - /* add mutex operation */ - spin_unlock_irqrestore(&per_cpu(l1sram_lock, cpu), flags); - - return addr; -} - -/* L1 Scratchpad memory allocate function */ -void *l1sram_alloc_max(size_t *psize) -{ - unsigned long flags; - void *addr; - unsigned int cpu; - - cpu = smp_processor_id(); - /* add mutex operation */ - spin_lock_irqsave(&per_cpu(l1sram_lock, cpu), flags); - - addr = _sram_alloc_max(&per_cpu(free_l1_ssram_head, cpu), - &per_cpu(used_l1_ssram_head, cpu), psize); - - /* add mutex operation */ - spin_unlock_irqrestore(&per_cpu(l1sram_lock, cpu), flags); - - return addr; -} - -/* L1 Scratchpad memory free function */ -int l1sram_free(const void *addr) -{ - unsigned long flags; - int ret; - unsigned int cpu; - - cpu = smp_processor_id(); - /* add mutex operation */ - spin_lock_irqsave(&per_cpu(l1sram_lock, cpu), flags); - - ret = _sram_free(addr, &per_cpu(free_l1_ssram_head, cpu), - &per_cpu(used_l1_ssram_head, cpu)); - - /* add mutex operation */ - spin_unlock_irqrestore(&per_cpu(l1sram_lock, cpu), 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; - int ret = -1; - - for (tmp = &mm->context.sram_list; *tmp; tmp = &(*tmp)->next) - if ((*tmp)->addr == addr) { - lsl = *tmp; - ret = sram_free(addr); - *tmp = lsl->next; - kfree(lsl); - break; - } - - return ret; -} -EXPORT_SYMBOL(sram_free_with_lsl); - -/* Allocate memory and keep in L1 SRAM List (lsl) so that the resources are - * tracked. These are designed for userspace so that when a process exits, - * we can safely reap their resources. - */ -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_show(struct seq_file *m, const char *desc, - struct sram_piece *pfree_head, - struct sram_piece *pused_head) -{ - struct sram_piece *pslot; - - if (!pfree_head || !pused_head) - return -1; - - seq_printf(m, "--- SRAM %-14s Size PID State \n", desc); - - /* search the relevant memory slot */ - pslot = pused_head->next; - - while (pslot != NULL) { - seq_printf(m, "%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) { - seq_printf(m, "%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_show(struct seq_file *m, void *v) -{ - unsigned int cpu; - - for (cpu = 0; cpu < num_possible_cpus(); ++cpu) { - if (_sram_proc_show(m, "Scratchpad", - &per_cpu(free_l1_ssram_head, cpu), &per_cpu(used_l1_ssram_head, cpu))) - goto not_done; -#if L1_DATA_A_LENGTH != 0 - if (_sram_proc_show(m, "L1 Data A", - &per_cpu(free_l1_data_A_sram_head, cpu), - &per_cpu(used_l1_data_A_sram_head, cpu))) - goto not_done; -#endif -#if L1_DATA_B_LENGTH != 0 - if (_sram_proc_show(m, "L1 Data B", - &per_cpu(free_l1_data_B_sram_head, cpu), - &per_cpu(used_l1_data_B_sram_head, cpu))) - goto not_done; -#endif -#if L1_CODE_LENGTH != 0 - if (_sram_proc_show(m, "L1 Instruction", - &per_cpu(free_l1_inst_sram_head, cpu), - &per_cpu(used_l1_inst_sram_head, cpu))) - goto not_done; -#endif - } -#if L2_LENGTH != 0 - if (_sram_proc_show(m, "L2", &free_l2_sram_head, &used_l2_sram_head)) - goto not_done; -#endif - not_done: - return 0; -} - -static int sram_proc_open(struct inode *inode, struct file *file) -{ - return single_open(file, sram_proc_show, NULL); -} - -static const struct file_operations sram_proc_ops = { - .open = sram_proc_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static int __init sram_proc_init(void) -{ - struct proc_dir_entry *ptr; - - ptr = proc_create("sram", S_IRUGO, NULL, &sram_proc_ops); - if (!ptr) { - printk(KERN_WARNING "unable to create /proc/sram\n"); - return -1; - } - return 0; -} -late_initcall(sram_proc_init); -#endif |
