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Diffstat (limited to 'ANDROID_3.4.5/arch/arm/kernel/tcm.c')
-rw-r--r--ANDROID_3.4.5/arch/arm/kernel/tcm.c337
1 files changed, 0 insertions, 337 deletions
diff --git a/ANDROID_3.4.5/arch/arm/kernel/tcm.c b/ANDROID_3.4.5/arch/arm/kernel/tcm.c
deleted file mode 100644
index 30ae6bb4..00000000
--- a/ANDROID_3.4.5/arch/arm/kernel/tcm.c
+++ /dev/null
@@ -1,337 +0,0 @@
-/*
- * Copyright (C) 2008-2009 ST-Ericsson AB
- * License terms: GNU General Public License (GPL) version 2
- * TCM memory handling for ARM systems
- *
- * Author: Linus Walleij <linus.walleij@stericsson.com>
- * Author: Rickard Andersson <rickard.andersson@stericsson.com>
- */
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/stddef.h>
-#include <linux/ioport.h>
-#include <linux/genalloc.h>
-#include <linux/string.h> /* memcpy */
-#include <asm/cputype.h>
-#include <asm/mach/map.h>
-#include <asm/memory.h>
-#include <asm/system_info.h>
-#include "tcm.h"
-
-static struct gen_pool *tcm_pool;
-static bool dtcm_present;
-static bool itcm_present;
-
-/* TCM section definitions from the linker */
-extern char __itcm_start, __sitcm_text, __eitcm_text;
-extern char __dtcm_start, __sdtcm_data, __edtcm_data;
-
-/* These will be increased as we run */
-u32 dtcm_end = DTCM_OFFSET;
-u32 itcm_end = ITCM_OFFSET;
-
-/*
- * TCM memory resources
- */
-static struct resource dtcm_res = {
- .name = "DTCM RAM",
- .start = DTCM_OFFSET,
- .end = DTCM_OFFSET,
- .flags = IORESOURCE_MEM
-};
-
-static struct resource itcm_res = {
- .name = "ITCM RAM",
- .start = ITCM_OFFSET,
- .end = ITCM_OFFSET,
- .flags = IORESOURCE_MEM
-};
-
-static struct map_desc dtcm_iomap[] __initdata = {
- {
- .virtual = DTCM_OFFSET,
- .pfn = __phys_to_pfn(DTCM_OFFSET),
- .length = 0,
- .type = MT_MEMORY_DTCM
- }
-};
-
-static struct map_desc itcm_iomap[] __initdata = {
- {
- .virtual = ITCM_OFFSET,
- .pfn = __phys_to_pfn(ITCM_OFFSET),
- .length = 0,
- .type = MT_MEMORY_ITCM
- }
-};
-
-/*
- * Allocate a chunk of TCM memory
- */
-void *tcm_alloc(size_t len)
-{
- unsigned long vaddr;
-
- if (!tcm_pool)
- return NULL;
-
- vaddr = gen_pool_alloc(tcm_pool, len);
- if (!vaddr)
- return NULL;
-
- return (void *) vaddr;
-}
-EXPORT_SYMBOL(tcm_alloc);
-
-/*
- * Free a chunk of TCM memory
- */
-void tcm_free(void *addr, size_t len)
-{
- gen_pool_free(tcm_pool, (unsigned long) addr, len);
-}
-EXPORT_SYMBOL(tcm_free);
-
-bool tcm_dtcm_present(void)
-{
- return dtcm_present;
-}
-EXPORT_SYMBOL(tcm_dtcm_present);
-
-bool tcm_itcm_present(void)
-{
- return itcm_present;
-}
-EXPORT_SYMBOL(tcm_itcm_present);
-
-static int __init setup_tcm_bank(u8 type, u8 bank, u8 banks,
- u32 *offset)
-{
- const int tcm_sizes[16] = { 0, -1, -1, 4, 8, 16, 32, 64, 128,
- 256, 512, 1024, -1, -1, -1, -1 };
- u32 tcm_region;
- int tcm_size;
-
- /*
- * If there are more than one TCM bank of this type,
- * select the TCM bank to operate on in the TCM selection
- * register.
- */
- if (banks > 1)
- asm("mcr p15, 0, %0, c9, c2, 0"
- : /* No output operands */
- : "r" (bank));
-
- /* Read the special TCM region register c9, 0 */
- if (!type)
- asm("mrc p15, 0, %0, c9, c1, 0"
- : "=r" (tcm_region));
- else
- asm("mrc p15, 0, %0, c9, c1, 1"
- : "=r" (tcm_region));
-
- tcm_size = tcm_sizes[(tcm_region >> 2) & 0x0f];
- if (tcm_size < 0) {
- pr_err("CPU: %sTCM%d of unknown size\n",
- type ? "I" : "D", bank);
- return -EINVAL;
- } else if (tcm_size > 32) {
- pr_err("CPU: %sTCM%d larger than 32k found\n",
- type ? "I" : "D", bank);
- return -EINVAL;
- } else {
- pr_info("CPU: found %sTCM%d %dk @ %08x, %senabled\n",
- type ? "I" : "D",
- bank,
- tcm_size,
- (tcm_region & 0xfffff000U),
- (tcm_region & 1) ? "" : "not ");
- }
-
- /* Not much fun you can do with a size 0 bank */
- if (tcm_size == 0)
- return 0;
-
- /* Force move the TCM bank to where we want it, enable */
- tcm_region = *offset | (tcm_region & 0x00000ffeU) | 1;
-
- if (!type)
- asm("mcr p15, 0, %0, c9, c1, 0"
- : /* No output operands */
- : "r" (tcm_region));
- else
- asm("mcr p15, 0, %0, c9, c1, 1"
- : /* No output operands */
- : "r" (tcm_region));
-
- /* Increase offset */
- *offset += (tcm_size << 10);
-
- pr_info("CPU: moved %sTCM%d %dk to %08x, enabled\n",
- type ? "I" : "D",
- bank,
- tcm_size,
- (tcm_region & 0xfffff000U));
- return 0;
-}
-
-/*
- * This initializes the TCM memory
- */
-void __init tcm_init(void)
-{
- u32 tcm_status;
- u8 dtcm_banks;
- u8 itcm_banks;
- size_t dtcm_code_sz = &__edtcm_data - &__sdtcm_data;
- size_t itcm_code_sz = &__eitcm_text - &__sitcm_text;
- char *start;
- char *end;
- char *ram;
- int ret;
- int i;
-
- /*
- * Prior to ARMv5 there is no TCM, and trying to read the status
- * register will hang the processor.
- */
- if (cpu_architecture() < CPU_ARCH_ARMv5) {
- if (dtcm_code_sz || itcm_code_sz)
- pr_info("CPU TCM: %u bytes of DTCM and %u bytes of "
- "ITCM code compiled in, but no TCM present "
- "in pre-v5 CPU\n", dtcm_code_sz, itcm_code_sz);
- return;
- }
-
- tcm_status = read_cpuid_tcmstatus();
- dtcm_banks = (tcm_status >> 16) & 0x03;
- itcm_banks = (tcm_status & 0x03);
-
- /* Values greater than 2 for D/ITCM banks are "reserved" */
- if (dtcm_banks > 2)
- dtcm_banks = 0;
- if (itcm_banks > 2)
- itcm_banks = 0;
-
- /* Setup DTCM if present */
- if (dtcm_banks > 0) {
- for (i = 0; i < dtcm_banks; i++) {
- ret = setup_tcm_bank(0, i, dtcm_banks, &dtcm_end);
- if (ret)
- return;
- }
- /* This means you compiled more code than fits into DTCM */
- if (dtcm_code_sz > (dtcm_end - DTCM_OFFSET)) {
- pr_info("CPU DTCM: %u bytes of code compiled to "
- "DTCM but only %lu bytes of DTCM present\n",
- dtcm_code_sz, (dtcm_end - DTCM_OFFSET));
- goto no_dtcm;
- }
- dtcm_res.end = dtcm_end - 1;
- request_resource(&iomem_resource, &dtcm_res);
- dtcm_iomap[0].length = dtcm_end - DTCM_OFFSET;
- iotable_init(dtcm_iomap, 1);
- /* Copy data from RAM to DTCM */
- start = &__sdtcm_data;
- end = &__edtcm_data;
- ram = &__dtcm_start;
- memcpy(start, ram, dtcm_code_sz);
- pr_debug("CPU DTCM: copied data from %p - %p\n",
- start, end);
- dtcm_present = true;
- } else if (dtcm_code_sz) {
- pr_info("CPU DTCM: %u bytes of code compiled to DTCM but no "
- "DTCM banks present in CPU\n", dtcm_code_sz);
- }
-
-no_dtcm:
- /* Setup ITCM if present */
- if (itcm_banks > 0) {
- for (i = 0; i < itcm_banks; i++) {
- ret = setup_tcm_bank(1, i, itcm_banks, &itcm_end);
- if (ret)
- return;
- }
- /* This means you compiled more code than fits into ITCM */
- if (itcm_code_sz > (itcm_end - ITCM_OFFSET)) {
- pr_info("CPU ITCM: %u bytes of code compiled to "
- "ITCM but only %lu bytes of ITCM present\n",
- itcm_code_sz, (itcm_end - ITCM_OFFSET));
- return;
- }
- itcm_res.end = itcm_end - 1;
- request_resource(&iomem_resource, &itcm_res);
- itcm_iomap[0].length = itcm_end - ITCM_OFFSET;
- iotable_init(itcm_iomap, 1);
- /* Copy code from RAM to ITCM */
- start = &__sitcm_text;
- end = &__eitcm_text;
- ram = &__itcm_start;
- memcpy(start, ram, itcm_code_sz);
- pr_debug("CPU ITCM: copied code from %p - %p\n",
- start, end);
- itcm_present = true;
- } else if (itcm_code_sz) {
- pr_info("CPU ITCM: %u bytes of code compiled to ITCM but no "
- "ITCM banks present in CPU\n", itcm_code_sz);
- }
-}
-
-/*
- * This creates the TCM memory pool and has to be done later,
- * during the core_initicalls, since the allocator is not yet
- * up and running when the first initialization runs.
- */
-static int __init setup_tcm_pool(void)
-{
- u32 dtcm_pool_start = (u32) &__edtcm_data;
- u32 itcm_pool_start = (u32) &__eitcm_text;
- int ret;
-
- /*
- * Set up malloc pool, 2^2 = 4 bytes granularity since
- * the TCM is sometimes just 4 KiB. NB: pages and cache
- * line alignments does not matter in TCM!
- */
- tcm_pool = gen_pool_create(2, -1);
-
- pr_debug("Setting up TCM memory pool\n");
-
- /* Add the rest of DTCM to the TCM pool */
- if (dtcm_present) {
- if (dtcm_pool_start < dtcm_end) {
- ret = gen_pool_add(tcm_pool, dtcm_pool_start,
- dtcm_end - dtcm_pool_start, -1);
- if (ret) {
- pr_err("CPU DTCM: could not add DTCM " \
- "remainder to pool!\n");
- return ret;
- }
- pr_debug("CPU DTCM: Added %08x bytes @ %08x to " \
- "the TCM memory pool\n",
- dtcm_end - dtcm_pool_start,
- dtcm_pool_start);
- }
- }
-
- /* Add the rest of ITCM to the TCM pool */
- if (itcm_present) {
- if (itcm_pool_start < itcm_end) {
- ret = gen_pool_add(tcm_pool, itcm_pool_start,
- itcm_end - itcm_pool_start, -1);
- if (ret) {
- pr_err("CPU ITCM: could not add ITCM " \
- "remainder to pool!\n");
- return ret;
- }
- pr_debug("CPU ITCM: Added %08x bytes @ %08x to " \
- "the TCM memory pool\n",
- itcm_end - itcm_pool_start,
- itcm_pool_start);
- }
- }
- return 0;
-}
-
-core_initcall(setup_tcm_pool);
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