@@ -848,6 +848,7 @@ config ARCH_DAVINCI
bool "TI DaVinci"
select GENERIC_CLOCKEVENTS
select ARCH_REQUIRE_GPIOLIB
+ select GENERIC_ALLOCATOR
select ZONE_DMA
select HAVE_IDE
select CLKDEV_LOOKUP
@@ -862,6 +863,7 @@ config ARCH_OMAP
select HAVE_CLK
select ARCH_REQUIRE_GPIOLIB
select ARCH_HAS_CPUFREQ
+ select GENERIC_ALLOCATOR
select GENERIC_CLOCKEVENTS
select HAVE_SCHED_CLOCK
select ARCH_HAS_HOLES_MEMORYMODEL
@@ -1099,7 +1099,7 @@ static struct davinci_soc_info davinci_soc_info_da850 = {
.gpio_irq = IRQ_DA8XX_GPIO0,
.serial_dev = &da8xx_serial_device,
.emac_pdata = &da8xx_emac_pdata,
- .sram_dma = DA8XX_ARM_RAM_BASE,
+ .sram_phys = DA8XX_ARM_RAM_BASE,
.sram_len = SZ_8K,
.reset_device = &da8xx_wdt_device,
};
@@ -850,7 +850,7 @@ static struct davinci_soc_info davinci_soc_info_dm355 = {
.gpio_num = 104,
.gpio_irq = IRQ_DM355_GPIOBNK0,
.serial_dev = &dm355_serial_device,
- .sram_dma = 0x00010000,
+ .sram_phys = 0x00010000,
.sram_len = SZ_32K,
.reset_device = &davinci_wdt_device,
};
@@ -1082,7 +1082,7 @@ static struct davinci_soc_info davinci_soc_info_dm365 = {
.gpio_unbanked = 8, /* really 16 ... skip muxed GPIOs */
.serial_dev = &dm365_serial_device,
.emac_pdata = &dm365_emac_pdata,
- .sram_dma = 0x00010000,
+ .sram_phys = 0x00010000,
.sram_len = SZ_32K,
.reset_device = &davinci_wdt_device,
};
@@ -764,7 +764,7 @@ static struct davinci_soc_info davinci_soc_info_dm644x = {
.gpio_irq = IRQ_GPIOBNK0,
.serial_dev = &dm644x_serial_device,
.emac_pdata = &dm644x_emac_pdata,
- .sram_dma = 0x00008000,
+ .sram_phys = 0x00008000,
.sram_len = SZ_16K,
.reset_device = &davinci_wdt_device,
};
@@ -848,7 +848,7 @@ static struct davinci_soc_info davinci_soc_info_dm646x = {
.gpio_irq = IRQ_DM646X_GPIOBNK0,
.serial_dev = &dm646x_serial_device,
.emac_pdata = &dm646x_emac_pdata,
- .sram_dma = 0x10010000,
+ .sram_phys = 0x10010000,
.sram_len = SZ_32K,
.reset_device = &davinci_wdt_device,
};
@@ -75,7 +75,7 @@ struct davinci_soc_info {
int gpio_ctlrs_num;
struct platform_device *serial_dev;
struct emac_platform_data *emac_pdata;
- dma_addr_t sram_dma;
+ phys_addr_t sram_phys;
unsigned sram_len;
struct platform_device *reset_device;
void (*reset)(struct platform_device *);
@@ -10,18 +10,11 @@
#ifndef __MACH_SRAM_H
#define __MACH_SRAM_H
+#include <linux/genalloc.h>
+
/* ARBITRARY: SRAM allocations are multiples of this 2^N size */
#define SRAM_GRANULARITY 512
-/*
- * SRAM allocations return a CPU virtual address, or NULL on error.
- * If a DMA address is requested and the SRAM supports DMA, its
- * mapped address is also returned.
- *
- * Errors include SRAM memory not being available, and requesting
- * DMA mapped SRAM on systems which don't allow that.
- */
-extern void *sram_alloc(size_t len, dma_addr_t *dma);
-extern void sram_free(void *addr, size_t len);
+extern struct gen_pool *davinci_gen_pool;
#endif /* __MACH_SRAM_H */
@@ -17,6 +17,7 @@
#include <asm/cacheflush.h>
#include <asm/delay.h>
+#include <asm/fncpy.h>
#include <mach/da8xx.h>
#include <mach/sram.h>
@@ -27,14 +28,9 @@
#define DEEPSLEEP_SLEEPCOUNT_MASK 0xFFFF
static void (*davinci_sram_suspend) (struct davinci_pm_config *);
+static void *davinci_sram_suspend_mem;
static struct davinci_pm_config *pdata;
-static void davinci_sram_push(void *dest, void *src, unsigned int size)
-{
- memcpy(dest, src, size);
- flush_icache_range((unsigned long)dest, (unsigned long)(dest + size));
-}
-
static void davinci_pm_suspend(void)
{
unsigned val;
@@ -123,14 +119,14 @@ static int __init davinci_pm_probe(struct platform_device *pdev)
return -ENOENT;
}
- davinci_sram_suspend = sram_alloc(davinci_cpu_suspend_sz, NULL);
- if (!davinci_sram_suspend) {
+ davinci_sram_suspend_mem = (void *)gen_pool_alloc(davinci_gen_pool,
+ davinci_cpu_suspend_sz);
+ if (!davinci_sram_suspend_mem) {
dev_err(&pdev->dev, "cannot allocate SRAM memory\n");
return -ENOMEM;
}
-
- davinci_sram_push(davinci_sram_suspend, davinci_cpu_suspend,
- davinci_cpu_suspend_sz);
+ davinci_sram_suspend = fncpy(davinci_sram_suspend_mem,
+ &davinci_cpu_suspend, davinci_cpu_suspend_sz);
suspend_set_ops(&davinci_pm_ops);
@@ -139,7 +135,8 @@ static int __init davinci_pm_probe(struct platform_device *pdev)
static int __exit davinci_pm_remove(struct platform_device *pdev)
{
- sram_free(davinci_sram_suspend, davinci_cpu_suspend_sz);
+ gen_pool_free(davinci_gen_pool, (unsigned long)davinci_sram_suspend_mem,
+ davinci_cpu_suspend_sz);
return 0;
}
@@ -10,40 +10,12 @@
*/
#include <linux/module.h>
#include <linux/init.h>
-#include <linux/genalloc.h>
#include <mach/common.h>
#include <mach/sram.h>
-static struct gen_pool *sram_pool;
-
-void *sram_alloc(size_t len, dma_addr_t *dma)
-{
- unsigned long vaddr;
- dma_addr_t dma_base = davinci_soc_info.sram_dma;
-
- if (dma)
- *dma = 0;
- if (!sram_pool || (dma && !dma_base))
- return NULL;
-
- vaddr = gen_pool_alloc(sram_pool, len);
- if (!vaddr)
- return NULL;
-
- if (dma)
- *dma = dma_base + (vaddr - SRAM_VIRT);
- return (void *)vaddr;
-
-}
-EXPORT_SYMBOL(sram_alloc);
-
-void sram_free(void *addr, size_t len)
-{
- gen_pool_free(sram_pool, (unsigned long) addr, len);
-}
-EXPORT_SYMBOL(sram_free);
-
+struct gen_pool *davinci_gen_pool;
+EXPORT_SYMBOL_GPL(davinci_gen_pool);
/*
* REVISIT This supports CPU and DMA access to/from SRAM, but it
@@ -54,18 +26,19 @@ EXPORT_SYMBOL(sram_free);
static int __init sram_init(void)
{
unsigned len = davinci_soc_info.sram_len;
- int status = 0;
- if (len) {
- len = min_t(unsigned, len, SRAM_SIZE);
- sram_pool = gen_pool_create(ilog2(SRAM_GRANULARITY), -1);
- if (!sram_pool)
- status = -ENOMEM;
- }
- if (sram_pool)
- status = gen_pool_add(sram_pool, SRAM_VIRT, len, -1);
- WARN_ON(status < 0);
- return status;
+ if (!len)
+ return 0;
+
+ len = min_t(unsigned, len, SRAM_SIZE);
+ davinci_gen_pool = gen_pool_create(ilog2(SRAM_GRANULARITY), -1);
+
+ if (!davinci_gen_pool)
+ return -ENOMEM;
+
+ WARN_ON(gen_pool_add_virt(davinci_gen_pool, SRAM_VIRT,
+ davinci_soc_info.sram_phys, len, -1));
+
+ return 0;
}
core_initcall(sram_init);
-
@@ -17,25 +17,41 @@
* MA 02110-1301, USA.
*/
#include <linux/errno.h>
+#include <linux/genalloc.h>
#ifdef CONFIG_IRAM_ALLOC
-int __init iram_init(unsigned long base, unsigned long size);
-void __iomem *iram_alloc(unsigned int size, unsigned long *dma_addr);
-void iram_free(unsigned long dma_addr, unsigned int size);
+int __init iram_init(phys_addr_t base, size_t size);
+
+extern struct gen_pool *mxc_iram_pool;
+
+static inline void *iram_alloc(size_t size, phys_addr_t *phys)
+{
+ unsigned long addr = gen_pool_alloc(iram_pool, size);
+
+ *phys = gen_pool_virt_to_phys(iram_pool, addr);
+
+ return (void*)addr;
+}
+
+static inline void iram_free(void *addr, size_t size)
+{
+ gen_pool_free(iram_pool, (unsigned long)addr, size);
+}
#else
-static inline int __init iram_init(unsigned long base, unsigned long size)
+static inline int __init iram_init(phys_addr_t base, size_t size)
{
return -ENOMEM;
}
-static inline void __iomem *iram_alloc(unsigned int size, unsigned long *dma_addr)
+static inline void *iram_alloc(size_t size, phys_addr_t *phys)
{
+ *phys = (phys_addr_t)-1ULL;
return NULL;
}
-static inline void iram_free(unsigned long base, unsigned long size) {}
+static inline void iram_free(void *addr, size_t size) {}
#endif
similarity index 56%
copy from arch/arm/plat-mxc/include/mach/iram.h
copy to arch/arm/plat-mxc/iram_alloc.c
@@ -16,26 +16,34 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
-#include <linux/errno.h>
-#ifdef CONFIG_IRAM_ALLOC
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/genalloc.h>
+#include <mach/iram.h>
-int __init iram_init(unsigned long base, unsigned long size);
-void __iomem *iram_alloc(unsigned int size, unsigned long *dma_addr);
-void iram_free(unsigned long dma_addr, unsigned int size);
+struct gen_pool *mxc_iram_pool;
+EXPORT_SYMBOL(mxc_iram_pool);
-#else
-
-static inline int __init iram_init(unsigned long base, unsigned long size)
+int __init iram_init(phys_addr_t base, size_t size)
{
- return -ENOMEM;
-}
+ void *addr = /*FIXME*/ ioremap(base, size);
-static inline void __iomem *iram_alloc(unsigned int size, unsigned long *dma_addr)
-{
- return NULL;
-}
+ if (!addr)
+ return -EIO;
-static inline void iram_free(unsigned long base, unsigned long size) {}
+ mxc_iram_pool = gen_pool_create(PAGE_SHIFT, -1);
+ if (!mxc_iram_pool) {
+ iounmap(addr);
+ return -ENOMEM;
+ }
-#endif
+ WARN_ON(gen_pool_add_virt(mxc_iram_pool, addr, base, size, -1));
+
+ pr_debug("i.MX IRAM pool: %lu KB@0x%08llx\n", size / 1024,
+ (unsigned long long)base);
+
+ return 0;
+}
@@ -12,16 +12,23 @@
#define __ARCH_ARM_OMAP_SRAM_H
#ifndef __ASSEMBLY__
+#include <linux/slab.h>
+#include <linux/genalloc.h>
#include <asm/fncpy.h>
-extern void *omap_sram_push_address(unsigned long size);
+extern struct gen_pool *omap_gen_pool;
-/* Macro to push a function to the internal SRAM, using the fncpy API */
+/*
+ * Note that fncpy requires the SRAM address to be aligned to an 8-byte
+ * boundary, so the min_alloc_order for the pool is set appropriately.
+ */
#define omap_sram_push(funcp, size) ({ \
- typeof(&(funcp)) _res = NULL; \
- void *_sram_address = omap_sram_push_address(size); \
- if (_sram_address) \
- _res = fncpy(_sram_address, &(funcp), size); \
+ typeof(&(funcp)) _res; \
+ size_t _sz = size; \
+ void *_sram = gen_pool_alloc(omap_gen_pool, _sz); \
+ _res = (_sram ? fncpy(_sram, &(funcp), _sz) : NULL); \
+ if (!_res) \
+ pr_err("Not enough space in SRAM\n"); \
_res; \
})
@@ -75,7 +75,6 @@
static unsigned long omap_sram_start;
static unsigned long omap_sram_base;
static unsigned long omap_sram_size;
-static unsigned long omap_sram_ceil;
/*
* Depending on the target RAMFS firewall setup, the public usable amount of
@@ -104,6 +103,8 @@ static int is_sram_locked(void)
return 1; /* assume locked with no PPA or security driver */
}
+struct gen_pool *omap_gen_pool;
+
/*
* The amount of SRAM depends on the core type.
* Note that we cannot try to test for SRAM here because writes
@@ -182,7 +183,18 @@ static void __init omap_detect_sram(void)
omap_sram_size - SRAM_BOOTLOADER_SZ);
omap_sram_size -= reserved;
- omap_sram_ceil = omap_sram_base + omap_sram_size;
+ {
+ /* The first SRAM_BOOTLOADER_SZ of SRAM are reserved */
+ void *base = (void *)omap_sram_base + SRAM_BOOTLOADER_SZ;
+ phys_addr_t phys = omap_sram_start + SRAM_BOOTLOADER_SZ;
+ size_t len = omap_sram_size - SRAM_BOOTLOADER_SZ;
+
+ omap_gen_pool = gen_pool_create(ilog2(FNCPY_ALIGN), -1);
+ if (omap_gen_pool)
+ WARN_ON(gen_pool_add_virt(omap_gen_pool,
+ (unsigned long)base, phys, len, -1));
+ WARN_ON(!omap_gen_pool);
+ }
}
static struct map_desc omap_sram_io_desc[] __initdata = {
@@ -242,26 +254,6 @@ static void __init omap_map_sram(void)
omap_sram_size - SRAM_BOOTLOADER_SZ);
}
-/*
- * Memory allocator for SRAM: calculates the new ceiling address
- * for pushing a function using the fncpy API.
- *
- * Note that fncpy requires the returned address to be aligned
- * to an 8-byte boundary.
- */
-void *omap_sram_push_address(unsigned long size)
-{
- if (size > (omap_sram_ceil - (omap_sram_base + SRAM_BOOTLOADER_SZ))) {
- printk(KERN_ERR "Not enough space in SRAM\n");
- return NULL;
- }
-
- omap_sram_ceil -= size;
- omap_sram_ceil = ROUND_DOWN(omap_sram_ceil, FNCPY_ALIGN);
-
- return (void *)omap_sram_ceil;
-}
-
#ifdef CONFIG_ARCH_OMAP1
static void (*_omap_sram_reprogram_clock)(u32 dpllctl, u32 ckctl);
@@ -385,8 +377,6 @@ u32 omap3_configure_core_dpll(u32 m2, u32 unlock_dll, u32 f, u32 inc,
#ifdef CONFIG_PM
void omap3_sram_restore_context(void)
{
- omap_sram_ceil = omap_sram_base + omap_sram_size;
-
_omap3_sram_configure_core_dpll =
omap_sram_push(omap3_sram_configure_core_dpll,
omap3_sram_configure_core_dpll_sz);
@@ -62,7 +62,7 @@ MODULE_PARM_DESC(extram_pool_sz, "external ram pool size to allocate");
struct uio_pruss_dev {
struct uio_info *info;
struct clk *pruss_clk;
- dma_addr_t sram_paddr;
+ phys_addr_t sram_paddr;
dma_addr_t ddr_paddr;
void __iomem *prussio_vaddr;
void *sram_vaddr;
@@ -106,7 +106,8 @@ static void pruss_cleanup(struct platform_device *dev,
gdev->ddr_paddr);
}
if (gdev->sram_vaddr)
- sram_free(gdev->sram_vaddr, sram_pool_sz);
+ gen_pool_free(davinci_gen_pool,
+ (unsigned long)gdev->sram_vaddr, sram_pool_sz);
kfree(gdev->info);
clk_put(gdev->pruss_clk);
kfree(gdev);
@@ -152,12 +153,15 @@ static int __devinit pruss_probe(struct platform_device *dev)
goto out_free;
}
- gdev->sram_vaddr = sram_alloc(sram_pool_sz, &(gdev->sram_paddr));
+ gdev->sram_vaddr = (void*)gen_pool_alloc(davinci_gen_pool, sram_pool_sz);
if (!gdev->sram_vaddr) {
dev_err(&dev->dev, "Could not allocate SRAM pool\n");
goto out_free;
}
+ gdev->sram_paddr = gen_pool_virt_to_phys(davinci_gen_pool,
+ (unsigned long)gdev->sram_vaddr);
+
gdev->ddr_vaddr = dma_alloc_coherent(&dev->dev, extram_pool_sz,
&(gdev->ddr_paddr), GFP_KERNEL | GFP_DMA);
if (!gdev->ddr_vaddr) {
@@ -232,16 +232,18 @@ static int allocate_sram(struct snd_pcm_substream *substream, unsigned size,
{
struct snd_dma_buffer *buf = &substream->dma_buffer;
struct snd_dma_buffer *iram_dma = NULL;
- dma_addr_t iram_phys = 0;
+ phys_addr_t iram_phys;
void *iram_virt = NULL;
if (buf->private_data || !size)
return 0;
ppcm->period_bytes_max = size;
- iram_virt = sram_alloc(size, &iram_phys);
+ iram_virt = (void*)gen_pool_alloc(davinci_gen_pool, size);
if (!iram_virt)
goto exit1;
+ iram_phys = gen_pool_virt_to_phys(davinci_gen_pool,
+ (unsigned long)iram_virt);
iram_dma = kzalloc(sizeof(*iram_dma), GFP_KERNEL);
if (!iram_dma)
goto exit2;
@@ -253,7 +255,7 @@ static int allocate_sram(struct snd_pcm_substream *substream, unsigned size,
return 0;
exit2:
if (iram_virt)
- sram_free(iram_virt, size);
+ gen_pool_free(davinci_gen_pool, (unsigned long)iram_virt, size);
exit1:
return -ENOMEM;
}
@@ -803,7 +805,8 @@ static void davinci_pcm_free(struct snd_pcm *pcm)
buf->area = NULL;
iram_dma = buf->private_data;
if (iram_dma) {
- sram_free(iram_dma->area, iram_dma->bytes);
+ gen_pool_free(davinci_gen_pool,
+ (unsigned long)iram_dma->area, iram_dma->bytes);
kfree(iram_dma);
}
}