arch: remove blackfin port

The Analog Devices Blackfin port was added in 2007 and was rather
active for a while, but all work on it has come to a standstill
over time, as Analog have changed their product line-up.

Aaron Wu confirmed that the architecture port is no longer relevant,
and multiple people suggested removing blackfin independently because
of some of its oddities like a non-working SMP port, and the amount of
duplication between the chip variants, which cause extra work when
doing cross-architecture changes.

Link: https://docs.blackfin.uclinux.org/
Acked-by: Aaron Wu <Aaron.Wu@analog.com>
Acked-by: Bryan Wu <cooloney@gmail.com>
Cc: Steven Miao <realmz6@gmail.com>
Cc: Mike Frysinger <vapier@chromium.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

6 files changed, 0 insertions, 1548 deletions

diff --git a/arch/blackfin/mm/Makefile b/arch/blackfin/mm/Makefile
deleted file mode 100644
index 4c011b1f661f..000000000000
--- a/arch/blackfin/mm/Makefile
+++ /dev/null
@@ -1,5 +0,0 @@
-#
-# arch/blackfin/mm/Makefile
-#
-
-obj-y := sram-alloc.o isram-driver.o init.o maccess.o
diff --git a/arch/blackfin/mm/blackfin_sram.h b/arch/blackfin/mm/blackfin_sram.h
deleted file mode 100644
index fb0b1599cfb7..000000000000
--- a/arch/blackfin/mm/blackfin_sram.h
+++ /dev/null
@@ -1,14 +0,0 @@
-/*
- * Local prototypes meant for internal use only
- *
- * Copyright 2006-2009 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#ifndef __BLACKFIN_SRAM_H__
-#define __BLACKFIN_SRAM_H__
-
-extern void *l1sram_alloc(size_t);
-
-#endif
diff --git a/arch/blackfin/mm/init.c b/arch/blackfin/mm/init.c
deleted file mode 100644
index b59cd7c3261a..000000000000
--- a/arch/blackfin/mm/init.c
+++ /dev/null
@@ -1,122 +0,0 @@
-/*
- * Copyright 2004-2009 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <linux/gfp.h>
-#include <linux/swap.h>
-#include <linux/bootmem.h>
-#include <linux/uaccess.h>
-#include <linux/export.h>
-#include <asm/bfin-global.h>
-#include <asm/pda.h>
-#include <asm/cplbinit.h>
-#include <asm/early_printk.h>
-#include "blackfin_sram.h"
-
-/*
- * ZERO_PAGE is a special page that is used for zero-initialized data and COW.
- * Let the bss do its zero-init magic so we don't have to do it ourselves.
- */
-char empty_zero_page[PAGE_SIZE] __attribute__((aligned(PAGE_SIZE)));
-EXPORT_SYMBOL(empty_zero_page);
-
-#ifndef CONFIG_EXCEPTION_L1_SCRATCH
-#if defined CONFIG_SYSCALL_TAB_L1
-__attribute__((l1_data))
-#endif
-static unsigned long exception_stack[NR_CPUS][1024];
-#endif
-
-struct blackfin_pda cpu_pda[NR_CPUS];
-EXPORT_SYMBOL(cpu_pda);
-
-/*
- * paging_init() continues the virtual memory environment setup which
- * was begun by the code in arch/head.S.
- * The parameters are pointers to where to stick the starting and ending
- * addresses  of available kernel virtual memory.
- */
-void __init paging_init(void)
-{
-	/*
-	 * make sure start_mem is page aligned, otherwise bootmem and
-	 * page_alloc get different views of the world
-	 */
-	unsigned long end_mem = memory_end & PAGE_MASK;
-
-	unsigned long zones_size[MAX_NR_ZONES] = {
-		[0] = 0,
-		[ZONE_DMA] = (end_mem - CONFIG_PHY_RAM_BASE_ADDRESS) >> PAGE_SHIFT,
-		[ZONE_NORMAL] = 0,
-#ifdef CONFIG_HIGHMEM
-		[ZONE_HIGHMEM] = 0,
-#endif
-	};
-
-	/* Set up SFC/DFC registers (user data space) */
-	set_fs(KERNEL_DS);
-
-	pr_debug("free_area_init -> start_mem is %#lx virtual_end is %#lx\n",
-	        PAGE_ALIGN(memory_start), end_mem);
-	free_area_init_node(0, zones_size,
-		CONFIG_PHY_RAM_BASE_ADDRESS >> PAGE_SHIFT, NULL);
-}
-
-asmlinkage void __init init_pda(void)
-{
-	unsigned int cpu = raw_smp_processor_id();
-
-	early_shadow_stamp();
-
-	/* Initialize the PDA fields holding references to other parts
-	   of the memory. The content of such memory is still
-	   undefined at the time of the call, we are only setting up
-	   valid pointers to it. */
-	memset(&cpu_pda[cpu], 0, sizeof(cpu_pda[cpu]));
-
-#ifdef CONFIG_EXCEPTION_L1_SCRATCH
-	cpu_pda[cpu].ex_stack = (unsigned long *)(L1_SCRATCH_START + \
-					L1_SCRATCH_LENGTH);
-#else
-	cpu_pda[cpu].ex_stack = exception_stack[cpu + 1];
-#endif
-
-#ifdef CONFIG_SMP
-	cpu_pda[cpu].imask = 0x1f;
-#endif
-}
-
-void __init mem_init(void)
-{
-	char buf[64];
-
-	high_memory = (void *)(memory_end & PAGE_MASK);
-	max_mapnr = MAP_NR(high_memory);
-	printk(KERN_DEBUG "Kernel managed physical pages: %lu\n", max_mapnr);
-
-	/* This will put all low memory onto the freelists. */
-	free_all_bootmem();
-
-	snprintf(buf, sizeof(buf) - 1, "%uK DMA", DMA_UNCACHED_REGION >> 10);
-	mem_init_print_info(buf);
-}
-
-#ifdef CONFIG_BLK_DEV_INITRD
-void __init free_initrd_mem(unsigned long start, unsigned long end)
-{
-#ifndef CONFIG_MPU
-	free_reserved_area((void *)start, (void *)end, -1, "initrd");
-#endif
-}
-#endif
-
-void __ref free_initmem(void)
-{
-#if defined CONFIG_RAMKERNEL && !defined CONFIG_MPU
-	free_initmem_default(-1);
-	if (memory_start == (unsigned long)(&__init_end))
-		memory_start = (unsigned long)(&__init_begin);
-#endif
-}
diff --git a/arch/blackfin/mm/isram-driver.c b/arch/blackfin/mm/isram-driver.c
deleted file mode 100644
index aaa1e64b753b..000000000000
--- a/arch/blackfin/mm/isram-driver.c
+++ /dev/null
@@ -1,411 +0,0 @@
-/*
- * Instruction SRAM accessor functions for the Blackfin
- *
- * Copyright 2008 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later
- */
-
-#define pr_fmt(fmt) "isram: " fmt
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/sched.h>
-#include <linux/sched/debug.h>
-
-#include <asm/blackfin.h>
-#include <asm/dma.h>
-
-/*
- * IMPORTANT WARNING ABOUT THESE FUNCTIONS
- *
- * The emulator will not function correctly if a write command is left in
- * ITEST_COMMAND or DTEST_COMMAND AND access to cache memory is needed by
- * the emulator. To avoid such problems, ensure that both ITEST_COMMAND
- * and DTEST_COMMAND are zero when exiting these functions.
- */
-
-
-/*
- * On the Blackfin, L1 instruction sram (which operates at core speeds) can not
- * be accessed by a normal core load, so we need to go through a few hoops to
- * read/write it.
- * To try to make it easier - we export a memcpy interface, where either src or
- * dest can be in this special L1 memory area.
- * The low level read/write functions should not be exposed to the rest of the
- * kernel, since they operate on 64-bit data, and need specific address alignment
- */
-
-static DEFINE_SPINLOCK(dtest_lock);
-
-/* Takes a void pointer */
-#define IADDR2DTEST(x) \
-	({ unsigned long __addr = (unsigned long)(x); \
-		((__addr & (1 << 11)) << (26 - 11)) | /* addr bit 11 (Way0/Way1)   */ \
-		(1 << 24)                           | /* instruction access = 1    */ \
-		((__addr & (1 << 15)) << (23 - 15)) | /* addr bit 15 (Data Bank)   */ \
-		((__addr & (3 << 12)) << (16 - 12)) | /* addr bits 13:12 (Subbank) */ \
-		(__addr & 0x47F8)                   | /* addr bits 14 & 10:3       */ \
-		(1 << 2);                             /* data array = 1            */ \
-	})
-
-/* Takes a pointer, and returns the offset (in bits) which things should be shifted */
-#define ADDR2OFFSET(x) ((((unsigned long)(x)) & 0x7) * 8)
-
-/* Takes a pointer, determines if it is the last byte in the isram 64-bit data type */
-#define ADDR2LAST(x) ((((unsigned long)x) & 0x7) == 0x7)
-
-static void isram_write(const void *addr, uint64_t data)
-{
-	uint32_t cmd;
-	unsigned long flags;
-
-	if (unlikely(addr >= (void *)(L1_CODE_START + L1_CODE_LENGTH)))
-		return;
-
-	cmd = IADDR2DTEST(addr) | 2;             /* write */
-
-	/*
-	 * Writes to DTEST_DATA[0:1] need to be atomic with write to DTEST_COMMAND
-	 * While in exception context - atomicity is guaranteed or double fault
-	 */
-	spin_lock_irqsave(&dtest_lock, flags);
-
-	bfin_write_DTEST_DATA0(data & 0xFFFFFFFF);
-	bfin_write_DTEST_DATA1(data >> 32);
-
-	/* use the builtin, since interrupts are already turned off */
-	__builtin_bfin_csync();
-	bfin_write_DTEST_COMMAND(cmd);
-	__builtin_bfin_csync();
-
-	bfin_write_DTEST_COMMAND(0);
-	__builtin_bfin_csync();
-
-	spin_unlock_irqrestore(&dtest_lock, flags);
-}
-
-static uint64_t isram_read(const void *addr)
-{
-	uint32_t cmd;
-	unsigned long flags;
-	uint64_t ret;
-
-	if (unlikely(addr > (void *)(L1_CODE_START + L1_CODE_LENGTH)))
-		return 0;
-
-	cmd = IADDR2DTEST(addr) | 0;              /* read */
-
-	/*
-	 * Reads of DTEST_DATA[0:1] need to be atomic with write to DTEST_COMMAND
-	 * While in exception context - atomicity is guaranteed or double fault
-	 */
-	spin_lock_irqsave(&dtest_lock, flags);
-	/* use the builtin, since interrupts are already turned off */
-	__builtin_bfin_csync();
-	bfin_write_DTEST_COMMAND(cmd);
-	__builtin_bfin_csync();
-	ret = bfin_read_DTEST_DATA0() | ((uint64_t)bfin_read_DTEST_DATA1() << 32);
-
-	bfin_write_DTEST_COMMAND(0);
-	__builtin_bfin_csync();
-	spin_unlock_irqrestore(&dtest_lock, flags);
-
-	return ret;
-}
-
-static bool isram_check_addr(const void *addr, size_t n)
-{
-	if ((addr >= (void *)L1_CODE_START) &&
-	    (addr < (void *)(L1_CODE_START + L1_CODE_LENGTH))) {
-		if (unlikely((addr + n) > (void *)(L1_CODE_START + L1_CODE_LENGTH))) {
-			show_stack(NULL, NULL);
-			pr_err("copy involving %p length (%zu) too long\n", addr, n);
-		}
-		return true;
-	}
-	return false;
-}
-
-/*
- * The isram_memcpy() function copies n bytes from memory area src to memory area dest.
- * The isram_memcpy() function returns a pointer to dest.
- * Either dest or src can be in L1 instruction sram.
- */
-void *isram_memcpy(void *dest, const void *src, size_t n)
-{
-	uint64_t data_in = 0, data_out = 0;
-	size_t count;
-	bool dest_in_l1, src_in_l1, need_data, put_data;
-	unsigned char byte, *src_byte, *dest_byte;
-
-	src_byte = (unsigned char *)src;
-	dest_byte = (unsigned char *)dest;
-
-	dest_in_l1 = isram_check_addr(dest, n);
-	src_in_l1 = isram_check_addr(src, n);
-
-	need_data = true;
-	put_data = true;
-	for (count = 0; count < n; count++) {
-		if (src_in_l1) {
-			if (need_data) {
-				data_in = isram_read(src + count);
-				need_data = false;
-			}
-
-			if (ADDR2LAST(src + count))
-				need_data = true;
-
-			byte = (unsigned char)((data_in >> ADDR2OFFSET(src + count)) & 0xff);
-
-		} else {
-			/* src is in L2 or L3 - so just dereference*/
-			byte = src_byte[count];
-		}
-
-		if (dest_in_l1) {
-			if (put_data) {
-				data_out = isram_read(dest + count);
-				put_data = false;
-			}
-
-			data_out &= ~((uint64_t)0xff << ADDR2OFFSET(dest + count));
-			data_out |= ((uint64_t)byte << ADDR2OFFSET(dest + count));
-
-			if (ADDR2LAST(dest + count)) {
-				put_data = true;
-				isram_write(dest + count, data_out);
-			}
-		} else {
-			/* dest in L2 or L3 - so just dereference */
-			dest_byte[count] = byte;
-		}
-	}
-
-	/* make sure we dump the last byte if necessary */
-	if (dest_in_l1 && !put_data)
-		isram_write(dest + count, data_out);
-
-	return dest;
-}
-EXPORT_SYMBOL(isram_memcpy);
-
-#ifdef CONFIG_BFIN_ISRAM_SELF_TEST
-
-static int test_len = 0x20000;
-
-static __init void hex_dump(unsigned char *buf, int len)
-{
-	while (len--)
-		pr_cont("%02x", *buf++);
-}
-
-static __init int isram_read_test(char *sdram, void *l1inst)
-{
-	int i, ret = 0;
-	uint64_t data1, data2;
-
-	pr_info("INFO: running isram_read tests\n");
-
-	/* setup some different data to play with */
-	for (i = 0; i < test_len; ++i)
-		sdram[i] = i % 255;
-	dma_memcpy(l1inst, sdram, test_len);
-
-	/* make sure we can read the L1 inst */
-	for (i = 0; i < test_len; i += sizeof(uint64_t)) {
-		data1 = isram_read(l1inst + i);
-		memcpy(&data2, sdram + i, sizeof(data2));
-		if (data1 != data2) {
-			pr_err("FAIL: isram_read(%p) returned %#llx but wanted %#llx\n",
-				l1inst + i, data1, data2);
-			++ret;
-		}
-	}
-
-	return ret;
-}
-
-static __init int isram_write_test(char *sdram, void *l1inst)
-{
-	int i, ret = 0;
-	uint64_t data1, data2;
-
-	pr_info("INFO: running isram_write tests\n");
-
-	/* setup some different data to play with */
-	memset(sdram, 0, test_len * 2);
-	dma_memcpy(l1inst, sdram, test_len);
-	for (i = 0; i < test_len; ++i)
-		sdram[i] = i % 255;
-
-	/* make sure we can write the L1 inst */
-	for (i = 0; i < test_len; i += sizeof(uint64_t)) {
-		memcpy(&data1, sdram + i, sizeof(data1));
-		isram_write(l1inst + i, data1);
-		data2 = isram_read(l1inst + i);
-		if (data1 != data2) {
-			pr_err("FAIL: isram_write(%p, %#llx) != %#llx\n",
-				l1inst + i, data1, data2);
-			++ret;
-		}
-	}
-
-	dma_memcpy(sdram + test_len, l1inst, test_len);
-	if (memcmp(sdram, sdram + test_len, test_len)) {
-		pr_err("FAIL: isram_write() did not work properly\n");
-		++ret;
-	}
-
-	return ret;
-}
-
-static __init int
-_isram_memcpy_test(char pattern, void *sdram, void *l1inst, const char *smemcpy,
-                   void *(*fmemcpy)(void *, const void *, size_t))
-{
-	memset(sdram, pattern, test_len);
-	fmemcpy(l1inst, sdram, test_len);
-	fmemcpy(sdram + test_len, l1inst, test_len);
-	if (memcmp(sdram, sdram + test_len, test_len)) {
-		pr_err("FAIL: %s(%p <=> %p, %#x) failed (data is %#x)\n",
-			smemcpy, l1inst, sdram, test_len, pattern);
-		return 1;
-	}
-	return 0;
-}
-#define _isram_memcpy_test(a, b, c, d) _isram_memcpy_test(a, b, c, #d, d)
-
-static __init int isram_memcpy_test(char *sdram, void *l1inst)
-{
-	int i, j, thisret, ret = 0;
-
-	/* check broad isram_memcpy() */
-	pr_info("INFO: running broad isram_memcpy tests\n");
-	for (i = 0xf; i >= 0; --i)
-		ret += _isram_memcpy_test(i, sdram, l1inst, isram_memcpy);
-
-	/* check read of small, unaligned, and hardware 64bit limits */
-	pr_info("INFO: running isram_memcpy (read) tests\n");
-
-	/* setup some different data to play with */
-	for (i = 0; i < test_len; ++i)
-		sdram[i] = i % 255;
-	dma_memcpy(l1inst, sdram, test_len);
-
-	thisret = 0;
-	for (i = 0; i < test_len - 32; ++i) {
-		unsigned char cmp[32];
-		for (j = 1; j <= 32; ++j) {
-			memset(cmp, 0, sizeof(cmp));
-			isram_memcpy(cmp, l1inst + i, j);
-			if (memcmp(cmp, sdram + i, j)) {
-				pr_err("FAIL: %p:", l1inst + 1);
-				hex_dump(cmp, j);
-				pr_cont(" SDRAM:");
-				hex_dump(sdram + i, j);
-				pr_cont("\n");
-				if (++thisret > 20) {
-					pr_err("FAIL: skipping remaining series\n");
-					i = test_len;
-					break;
-				}
-			}
-		}
-	}
-	ret += thisret;
-
-	/* check write of small, unaligned, and hardware 64bit limits */
-	pr_info("INFO: running isram_memcpy (write) tests\n");
-
-	memset(sdram + test_len, 0, test_len);
-	dma_memcpy(l1inst, sdram + test_len, test_len);
-
-	thisret = 0;
-	for (i = 0; i < test_len - 32; ++i) {
-		unsigned char cmp[32];
-		for (j = 1; j <= 32; ++j) {
-			isram_memcpy(l1inst + i, sdram + i, j);
-			dma_memcpy(cmp, l1inst + i, j);
-			if (memcmp(cmp, sdram + i, j)) {
-				pr_err("FAIL: %p:", l1inst + i);
-				hex_dump(cmp, j);
-				pr_cont(" SDRAM:");
-				hex_dump(sdram + i, j);
-				pr_cont("\n");
-				if (++thisret > 20) {
-					pr_err("FAIL: skipping remaining series\n");
-					i = test_len;
-					break;
-				}
-			}
-		}
-	}
-	ret += thisret;
-
-	return ret;
-}
-
-static __init int isram_test_init(void)
-{
-	int ret;
-	char *sdram;
-	void *l1inst;
-
-	/* Try to test as much of L1SRAM as possible */
-	while (test_len) {
-		test_len >>= 1;
-		l1inst = l1_inst_sram_alloc(test_len);
-		if (l1inst)
-			break;
-	}
-	if (!l1inst) {
-		pr_warning("SKIP: could not allocate L1 inst\n");
-		return 0;
-	}
-	pr_info("INFO: testing %#x bytes (%p - %p)\n",
-	        test_len, l1inst, l1inst + test_len);
-
-	sdram = kmalloc(test_len * 2, GFP_KERNEL);
-	if (!sdram) {
-		sram_free(l1inst);
-		pr_warning("SKIP: could not allocate sdram\n");
-		return 0;
-	}
-
-	/* sanity check initial L1 inst state */
-	ret = 1;
-	pr_info("INFO: running initial dma_memcpy checks %p\n", sdram);
-	if (_isram_memcpy_test(0xa, sdram, l1inst, dma_memcpy))
-		goto abort;
-	if (_isram_memcpy_test(0x5, sdram, l1inst, dma_memcpy))
-		goto abort;
-
-	ret = 0;
-	ret += isram_read_test(sdram, l1inst);
-	ret += isram_write_test(sdram, l1inst);
-	ret += isram_memcpy_test(sdram, l1inst);
-
- abort:
-	sram_free(l1inst);
-	kfree(sdram);
-
-	if (ret)
-		return -EIO;
-
-	pr_info("PASS: all tests worked !\n");
-	return 0;
-}
-late_initcall(isram_test_init);
-
-static __exit void isram_test_exit(void)
-{
-	/* stub to allow unloading */
-}
-module_exit(isram_test_exit);
-
-#endif
diff --git a/arch/blackfin/mm/maccess.c b/arch/blackfin/mm/maccess.c
deleted file mode 100644
index e2532114c5fd..000000000000
--- a/arch/blackfin/mm/maccess.c
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * safe read and write memory routines callable while atomic
- *
- * Copyright 2005-2008 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <linux/uaccess.h>
-#include <asm/dma.h>
-
-static int validate_memory_access_address(unsigned long addr, int size)
-{
-	if (size < 0 || addr == 0)
-		return -EFAULT;
-	return bfin_mem_access_type(addr, size);
-}
-
-long probe_kernel_read(void *dst, const void *src, size_t size)
-{
-	unsigned long lsrc = (unsigned long)src;
-	int mem_type;
-
-	mem_type = validate_memory_access_address(lsrc, size);
-	if (mem_type < 0)
-		return mem_type;
-
-	if (lsrc >= SYSMMR_BASE) {
-		if (size == 2 && lsrc % 2 == 0) {
-			u16 mmr = bfin_read16(src);
-			memcpy(dst, &mmr, sizeof(mmr));
-			return 0;
-		} else if (size == 4 && lsrc % 4 == 0) {
-			u32 mmr = bfin_read32(src);
-			memcpy(dst, &mmr, sizeof(mmr));
-			return 0;
-		}
-	} else {
-		switch (mem_type) {
-		case BFIN_MEM_ACCESS_CORE:
-		case BFIN_MEM_ACCESS_CORE_ONLY:
-			return __probe_kernel_read(dst, src, size);
-			/* XXX: should support IDMA here with SMP */
-		case BFIN_MEM_ACCESS_DMA:
-			if (dma_memcpy(dst, src, size))
-				return 0;
-			break;
-		case BFIN_MEM_ACCESS_ITEST:
-			if (isram_memcpy(dst, src, size))
-				return 0;
-			break;
-		}
-	}
-
-	return -EFAULT;
-}
-
-long probe_kernel_write(void *dst, const void *src, size_t size)
-{
-	unsigned long ldst = (unsigned long)dst;
-	int mem_type;
-
-	mem_type = validate_memory_access_address(ldst, size);
-	if (mem_type < 0)
-		return mem_type;
-
-	if (ldst >= SYSMMR_BASE) {
-		if (size == 2 && ldst % 2 == 0) {
-			u16 mmr;
-			memcpy(&mmr, src, sizeof(mmr));
-			bfin_write16(dst, mmr);
-			return 0;
-		} else if (size == 4 && ldst % 4 == 0) {
-			u32 mmr;
-			memcpy(&mmr, src, sizeof(mmr));
-			bfin_write32(dst, mmr);
-			return 0;
-		}
-	} else {
-		switch (mem_type) {
-		case BFIN_MEM_ACCESS_CORE:
-		case BFIN_MEM_ACCESS_CORE_ONLY:
-			return __probe_kernel_write(dst, src, size);
-			/* XXX: should support IDMA here with SMP */
-		case BFIN_MEM_ACCESS_DMA:
-			if (dma_memcpy(dst, src, size))
-				return 0;
-			break;
-		case BFIN_MEM_ACCESS_ITEST:
-			if (isram_memcpy(dst, src, size))
-				return 0;
-			break;
-		}
-	}
-
-	return -EFAULT;
-}
diff --git a/arch/blackfin/mm/sram-alloc.c b/arch/blackfin/mm/sram-alloc.c
deleted file mode 100644
index d2a96c2c02a3..000000000000
--- 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