Blackfin arch: Extend sram malloc to handle L2 SRAM.
Extend system call to alloc L2 SRAM in application.
Automatically move following sections to L2 SRAM:
1. kernel built-in l2 attribute section
2. kernel module l2 attribute section
3. elf-fdpic application l2 attribute section
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
diff --git a/arch/blackfin/mm/blackfin_sram.c b/arch/blackfin/mm/blackfin_sram.c
index b58cf19..5af3c31 100644
--- a/arch/blackfin/mm/blackfin_sram.c
+++ b/arch/blackfin/mm/blackfin_sram.c
@@ -42,6 +42,7 @@
#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 {
@@ -65,6 +66,10 @@
static struct sram_piece free_l1_inst_sram_head, used_l1_inst_sram_head;
#endif
+#ifdef L2_LENGTH
+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 */
@@ -97,7 +102,7 @@
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 Data A SRAM.\n");
+ printk(KERN_INFO"Fail to initialize L1 Data A SRAM.\n");
return;
}
@@ -110,7 +115,7 @@
used_l1_data_A_sram_head.next = NULL;
- printk(KERN_INFO "Blackfin Data A SRAM: %d KB (%d KB free)\n",
+ 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
@@ -118,7 +123,7 @@
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 Data B SRAM.\n");
+ printk(KERN_INFO"Fail to initialize L1 Data B SRAM.\n");
return;
}
@@ -131,7 +136,7 @@
used_l1_data_B_sram_head.next = NULL;
- printk(KERN_INFO "Blackfin Data B SRAM: %d KB (%d KB free)\n",
+ 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
@@ -146,7 +151,7 @@
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 Instruction SRAM.\n");
+ printk(KERN_INFO"Fail to initialize L1 Instruction SRAM.\n");
return;
}
@@ -159,7 +164,7 @@
used_l1_inst_sram_head.next = NULL;
- printk(KERN_INFO "Blackfin Instruction SRAM: %d KB (%d KB free)\n",
+ 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
@@ -168,6 +173,33 @@
spin_lock_init(&l1_inst_sram_lock);
}
+static void __init l2_sram_init(void)
+{
+#ifdef L2_LENGTH
+ 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",
@@ -177,10 +209,11 @@
l1sram_init();
l1_data_sram_init();
l1_inst_sram_init();
+ l2_sram_init();
}
-/* L1 memory allocate function */
-static void *_l1_sram_alloc(size_t size, struct sram_piece *pfree_head,
+/* 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;
@@ -236,7 +269,7 @@
}
/* Allocate the largest available block. */
-static void *_l1_sram_alloc_max(struct sram_piece *pfree_head,
+static void *_sram_alloc_max(struct sram_piece *pfree_head,
struct sram_piece *pused_head,
unsigned long *psize)
{
@@ -259,11 +292,11 @@
*psize = pmax->size;
- return _l1_sram_alloc(*psize, pfree_head, pused_head);
+ return _sram_alloc(*psize, pfree_head, pused_head);
}
-/* L1 memory free function */
-static int _l1_sram_free(const void *addr,
+/* SRAM free function */
+static int _sram_free(const void *addr,
struct sram_piece *pfree_head,
struct sram_piece *pused_head)
{
@@ -334,6 +367,11 @@
&& addr < (void *)(L1_DATA_B_START + L1_DATA_B_LENGTH))
return l1_data_B_sram_free(addr);
#endif
+#ifdef L2_LENGTH
+ else if (addr >= (void *)L2_START
+ && addr < (void *)(L2_START + L2_LENGTH))
+ return l2_sram_free(addr);
+#endif
else
return -1;
}
@@ -348,7 +386,7 @@
spin_lock_irqsave(&l1_data_sram_lock, flags);
#if L1_DATA_A_LENGTH != 0
- addr = _l1_sram_alloc(size, &free_l1_data_A_sram_head,
+ addr = _sram_alloc(size, &free_l1_data_A_sram_head,
&used_l1_data_A_sram_head);
#endif
@@ -371,7 +409,7 @@
spin_lock_irqsave(&l1_data_sram_lock, flags);
#if L1_DATA_A_LENGTH != 0
- ret = _l1_sram_free(addr, &free_l1_data_A_sram_head,
+ ret = _sram_free(addr, &free_l1_data_A_sram_head,
&used_l1_data_A_sram_head);
#else
ret = -1;
@@ -393,7 +431,7 @@
/* add mutex operation */
spin_lock_irqsave(&l1_data_sram_lock, flags);
- addr = _l1_sram_alloc(size, &free_l1_data_B_sram_head,
+ addr = _sram_alloc(size, &free_l1_data_B_sram_head,
&used_l1_data_B_sram_head);
/* add mutex operation */
@@ -418,7 +456,7 @@
/* add mutex operation */
spin_lock_irqsave(&l1_data_sram_lock, flags);
- ret = _l1_sram_free(addr, &free_l1_data_B_sram_head,
+ ret = _sram_free(addr, &free_l1_data_B_sram_head,
&used_l1_data_B_sram_head);
/* add mutex operation */
@@ -472,7 +510,7 @@
/* add mutex operation */
spin_lock_irqsave(&l1_inst_sram_lock, flags);
- addr = _l1_sram_alloc(size, &free_l1_inst_sram_head,
+ addr = _sram_alloc(size, &free_l1_inst_sram_head,
&used_l1_inst_sram_head);
/* add mutex operation */
@@ -497,7 +535,7 @@
/* add mutex operation */
spin_lock_irqsave(&l1_inst_sram_lock, flags);
- ret = _l1_sram_free(addr, &free_l1_inst_sram_head,
+ ret = _sram_free(addr, &free_l1_inst_sram_head,
&used_l1_inst_sram_head);
/* add mutex operation */
@@ -519,7 +557,7 @@
/* add mutex operation */
spin_lock_irqsave(&l1sram_lock, flags);
- addr = _l1_sram_alloc(size, &free_l1_ssram_head,
+ addr = _sram_alloc(size, &free_l1_ssram_head,
&used_l1_ssram_head);
/* add mutex operation */
@@ -537,7 +575,7 @@
/* add mutex operation */
spin_lock_irqsave(&l1sram_lock, flags);
- addr = _l1_sram_alloc_max(&free_l1_ssram_head,
+ addr = _sram_alloc_max(&free_l1_ssram_head,
&used_l1_ssram_head, psize);
/* add mutex operation */
@@ -555,7 +593,7 @@
/* add mutex operation */
spin_lock_irqsave(&l1sram_lock, flags);
- ret = _l1_sram_free(addr, &free_l1_ssram_head,
+ ret = _sram_free(addr, &free_l1_ssram_head,
&used_l1_ssram_head);
/* add mutex operation */
@@ -564,6 +602,64 @@
return ret;
}
+void *l2_sram_alloc(size_t size)
+{
+#ifdef L2_LENGTH
+ unsigned 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)
+{
+#ifdef L2_LENGTH
+ unsigned 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;
@@ -602,6 +698,9 @@
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;
@@ -621,7 +720,7 @@
/* Need to keep line of output the same. Currently, that is 44 bytes
* (including newline).
*/
-static int _l1sram_proc_read(char *buf, int *len, int count, const char *desc,
+static int _sram_proc_read(char *buf, int *len, int count, const char *desc,
struct sram_piece *pfree_head,
struct sram_piece *pused_head)
{
@@ -630,13 +729,13 @@
if (!pfree_head || !pused_head)
return -1;
- *len += sprintf(&buf[*len], "--- L1 %-14s Size PID State \n", desc);
+ *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 %8i %5i %-10s\n",
+ *len += sprintf(&buf[*len], "%p-%p %10i %5i %-10s\n",
pslot->paddr, pslot->paddr + pslot->size,
pslot->size, pslot->pid, "ALLOCATED");
@@ -646,7 +745,7 @@
pslot = pfree_head->next;
while (pslot != NULL) {
- *len += sprintf(&buf[*len], "%p-%p %8i %5i %-10s\n",
+ *len += sprintf(&buf[*len], "%p-%p %10i %5i %-10s\n",
pslot->paddr, pslot->paddr + pslot->size,
pslot->size, pslot->pid, "FREE");
@@ -655,38 +754,43 @@
return 0;
}
-static int l1sram_proc_read(char *buf, char **start, off_t offset, int count,
+static int sram_proc_read(char *buf, char **start, off_t offset, int count,
int *eof, void *data)
{
int len = 0;
- if (_l1sram_proc_read(buf, &len, count, "Scratchpad",
+ 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 (_l1sram_proc_read(buf, &len, count, "Data A",
+ 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 (_l1sram_proc_read(buf, &len, count, "Data B",
+ 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 (_l1sram_proc_read(buf, &len, count, "Instruction",
+ if (_sram_proc_read(buf, &len, count, "L1 Instruction",
&free_l1_inst_sram_head, &used_l1_inst_sram_head))
goto not_done;
#endif
+#ifdef L2_LENGTH
+ 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 l1sram_proc_init(void)
+static int __init sram_proc_init(void)
{
struct proc_dir_entry *ptr;
ptr = create_proc_entry("sram", S_IFREG | S_IRUGO, NULL);
@@ -695,8 +799,8 @@
return -1;
}
ptr->owner = THIS_MODULE;
- ptr->read_proc = l1sram_proc_read;
+ ptr->read_proc = sram_proc_read;
return 0;
}
-late_initcall(l1sram_proc_init);
+late_initcall(sram_proc_init);
#endif