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-rw-r--r--arch/arm/kernel/machine_kexec.c10
-rw-r--r--arch/arm/kernel/process.c29
-rw-r--r--arch/arm/kernel/smp.c17
-rw-r--r--arch/arm/kernel/smp_twd.c3
-rw-r--r--arch/arm/kernel/tcm.c118
5 files changed, 116 insertions, 61 deletions
diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c
index 81e989858d42..1fc74cbd1a19 100644
--- a/arch/arm/kernel/machine_kexec.c
+++ b/arch/arm/kernel/machine_kexec.c
@@ -37,10 +37,6 @@ void machine_kexec_cleanup(struct kimage *image)
{
}
-void machine_shutdown(void)
-{
-}
-
void machine_crash_shutdown(struct pt_regs *regs)
{
local_irq_disable();
@@ -78,7 +74,11 @@ void machine_kexec(struct kimage *image)
(unsigned long) reboot_code_buffer + KEXEC_CONTROL_PAGE_SIZE);
printk(KERN_INFO "Bye!\n");
- cpu_proc_fin();
+ local_irq_disable();
+ local_fiq_disable();
setup_mm_for_reboot(0); /* mode is not used, so just pass 0*/
+ flush_cache_all();
+ cpu_proc_fin();
+ flush_cache_all();
cpu_reset(reboot_code_buffer_phys);
}
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index a4a9cc88bec7..2e2ec97cc50c 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -29,6 +29,7 @@
#include <linux/utsname.h>
#include <linux/uaccess.h>
+#include <asm/cacheflush.h>
#include <asm/leds.h>
#include <asm/processor.h>
#include <asm/system.h>
@@ -84,10 +85,9 @@ __setup("hlt", hlt_setup);
void arm_machine_restart(char mode, const char *cmd)
{
- /*
- * Clean and disable cache, and turn off interrupts
- */
- cpu_proc_fin();
+ /* Disable interrupts first */
+ local_irq_disable();
+ local_fiq_disable();
/*
* Tell the mm system that we are going to reboot -
@@ -96,6 +96,15 @@ void arm_machine_restart(char mode, const char *cmd)
*/
setup_mm_for_reboot(mode);
+ /* Clean and invalidate caches */
+ flush_cache_all();
+
+ /* Turn off caching */
+ cpu_proc_fin();
+
+ /* Push out any further dirty data, and ensure cache is empty */
+ flush_cache_all();
+
/*
* Now call the architecture specific reboot code.
*/
@@ -189,19 +198,29 @@ int __init reboot_setup(char *str)
__setup("reboot=", reboot_setup);
-void machine_halt(void)
+void machine_shutdown(void)
{
+#ifdef CONFIG_SMP
+ smp_send_stop();
+#endif
}
+void machine_halt(void)
+{
+ machine_shutdown();
+ while (1);
+}
void machine_power_off(void)
{
+ machine_shutdown();
if (pm_power_off)
pm_power_off();
}
void machine_restart(char *cmd)
{
+ machine_shutdown();
arm_pm_restart(reboot_mode, cmd);
}
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index b8c3d0f689d9..40dc74f2b27f 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -429,7 +429,11 @@ static void smp_timer_broadcast(const struct cpumask *mask)
{
send_ipi_message(mask, IPI_TIMER);
}
+#else
+#define smp_timer_broadcast NULL
+#endif
+#ifndef CONFIG_LOCAL_TIMERS
static void broadcast_timer_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
{
@@ -444,7 +448,6 @@ static void local_timer_setup(struct clock_event_device *evt)
evt->rating = 400;
evt->mult = 1;
evt->set_mode = broadcast_timer_set_mode;
- evt->broadcast = smp_timer_broadcast;
clockevents_register_device(evt);
}
@@ -456,6 +459,7 @@ void __cpuinit percpu_timer_setup(void)
struct clock_event_device *evt = &per_cpu(percpu_clockevent, cpu);
evt->cpumask = cpumask_of(cpu);
+ evt->broadcast = smp_timer_broadcast;
local_timer_setup(evt);
}
@@ -467,10 +471,13 @@ static DEFINE_SPINLOCK(stop_lock);
*/
static void ipi_cpu_stop(unsigned int cpu)
{
- spin_lock(&stop_lock);
- printk(KERN_CRIT "CPU%u: stopping\n", cpu);
- dump_stack();
- spin_unlock(&stop_lock);
+ if (system_state == SYSTEM_BOOTING ||
+ system_state == SYSTEM_RUNNING) {
+ spin_lock(&stop_lock);
+ printk(KERN_CRIT "CPU%u: stopping\n", cpu);
+ dump_stack();
+ spin_unlock(&stop_lock);
+ }
set_cpu_online(cpu, false);
diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c
index 7c5f0c024db7..35882fbf37f9 100644
--- a/arch/arm/kernel/smp_twd.c
+++ b/arch/arm/kernel/smp_twd.c
@@ -132,7 +132,8 @@ void __cpuinit twd_timer_setup(struct clock_event_device *clk)
twd_calibrate_rate();
clk->name = "local_timer";
- clk->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
+ clk->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT |
+ CLOCK_EVT_FEAT_C3STOP;
clk->rating = 350;
clk->set_mode = twd_set_mode;
clk->set_next_event = twd_set_next_event;
diff --git a/arch/arm/kernel/tcm.c b/arch/arm/kernel/tcm.c
index e50303868f1b..26685c2f7a49 100644
--- a/arch/arm/kernel/tcm.c
+++ b/arch/arm/kernel/tcm.c
@@ -13,38 +13,35 @@
#include <linux/ioport.h>
#include <linux/genalloc.h>
#include <linux/string.h> /* memcpy */
-#include <asm/page.h> /* PAGE_SHIFT */
#include <asm/cputype.h>
#include <asm/mach/map.h>
#include <mach/memory.h>
#include "tcm.h"
-/* Scream and warn about misuse */
-#if !defined(ITCM_OFFSET) || !defined(ITCM_END) || \
- !defined(DTCM_OFFSET) || !defined(DTCM_END)
-#error "TCM support selected but offsets not defined!"
-#endif
-
static struct gen_pool *tcm_pool;
/* 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_END,
+ .end = DTCM_OFFSET,
.flags = IORESOURCE_MEM
};
static struct resource itcm_res = {
.name = "ITCM RAM",
.start = ITCM_OFFSET,
- .end = ITCM_END,
+ .end = ITCM_OFFSET,
.flags = IORESOURCE_MEM
};
@@ -52,8 +49,8 @@ static struct map_desc dtcm_iomap[] __initdata = {
{
.virtual = DTCM_OFFSET,
.pfn = __phys_to_pfn(DTCM_OFFSET),
- .length = (DTCM_END - DTCM_OFFSET + 1),
- .type = MT_UNCACHED
+ .length = 0,
+ .type = MT_MEMORY_DTCM
}
};
@@ -61,8 +58,8 @@ static struct map_desc itcm_iomap[] __initdata = {
{
.virtual = ITCM_OFFSET,
.pfn = __phys_to_pfn(ITCM_OFFSET),
- .length = (ITCM_END - ITCM_OFFSET + 1),
- .type = MT_UNCACHED
+ .length = 0,
+ .type = MT_MEMORY_ITCM
}
};
@@ -93,14 +90,24 @@ void tcm_free(void *addr, size_t len)
}
EXPORT_SYMBOL(tcm_free);
-
-static void __init setup_tcm_bank(u8 type, u32 offset, u32 expected_size)
+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"
@@ -111,26 +118,24 @@ static void __init setup_tcm_bank(u8 type, u32 offset, u32 expected_size)
tcm_size = tcm_sizes[(tcm_region >> 2) & 0x0f];
if (tcm_size < 0) {
- pr_err("CPU: %sTCM of unknown size!\n",
- type ? "I" : "D");
+ 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 %dk @ %08x, %senabled\n",
+ pr_info("CPU: found %sTCM%d %dk @ %08x, %senabled\n",
type ? "I" : "D",
+ bank,
tcm_size,
(tcm_region & 0xfffff000U),
(tcm_region & 1) ? "" : "not ");
}
- if (tcm_size != expected_size) {
- pr_crit("CPU: %sTCM was detected %dk but expected %dk!\n",
- type ? "I" : "D",
- tcm_size,
- expected_size);
- /* Adjust to the expected size? what can we do... */
- }
-
/* Force move the TCM bank to where we want it, enable */
- tcm_region = offset | (tcm_region & 0x00000ffeU) | 1;
+ tcm_region = *offset | (tcm_region & 0x00000ffeU) | 1;
if (!type)
asm("mcr p15, 0, %0, c9, c1, 0"
@@ -141,10 +146,15 @@ static void __init setup_tcm_bank(u8 type, u32 offset, u32 expected_size)
: /* No output operands */
: "r" (tcm_region));
- pr_debug("CPU: moved %sTCM %dk to %08x, enabled\n",
- type ? "I" : "D",
- tcm_size,
- (tcm_region & 0xfffff000U));
+ /* 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;
}
/*
@@ -153,34 +163,52 @@ static void __init setup_tcm_bank(u8 type, u32 offset, u32 expected_size)
void __init tcm_init(void)
{
u32 tcm_status = read_cpuid_tcmstatus();
+ u8 dtcm_banks = (tcm_status >> 16) & 0x03;
+ u8 itcm_banks = (tcm_status & 0x03);
char *start;
char *end;
char *ram;
+ int ret;
+ int i;
/* Setup DTCM if present */
- if (tcm_status & (1 << 16)) {
- setup_tcm_bank(0, DTCM_OFFSET,
- (DTCM_END - DTCM_OFFSET + 1) >> 10);
+ if (dtcm_banks > 0) {
+ for (i = 0; i < dtcm_banks; i++) {
+ ret = setup_tcm_bank(0, i, dtcm_banks, &dtcm_end);
+ if (ret)
+ return;
+ }
+ 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;
+ /* This means you compiled more code than fits into DTCM */
+ BUG_ON((end - start) > (dtcm_end - DTCM_OFFSET));
memcpy(start, ram, (end-start));
pr_debug("CPU DTCM: copied data from %p - %p\n", start, end);
}
/* Setup ITCM if present */
- if (tcm_status & 1) {
- setup_tcm_bank(1, ITCM_OFFSET,
- (ITCM_END - ITCM_OFFSET + 1) >> 10);
+ if (itcm_banks > 0) {
+ for (i = 0; i < itcm_banks; i++) {
+ ret = setup_tcm_bank(1, i, itcm_banks, &itcm_end);
+ if (ret)
+ 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;
+ /* This means you compiled more code than fits into ITCM */
+ BUG_ON((end - start) > (itcm_end - ITCM_OFFSET));
memcpy(start, ram, (end-start));
pr_debug("CPU ITCM: copied code from %p - %p\n", start, end);
}
@@ -208,10 +236,10 @@ static int __init setup_tcm_pool(void)
pr_debug("Setting up TCM memory pool\n");
/* Add the rest of DTCM to the TCM pool */
- if (tcm_status & (1 << 16)) {
- if (dtcm_pool_start < DTCM_END) {
+ if (tcm_status & (0x03 << 16)) {
+ if (dtcm_pool_start < dtcm_end) {
ret = gen_pool_add(tcm_pool, dtcm_pool_start,
- DTCM_END - dtcm_pool_start + 1, -1);
+ dtcm_end - dtcm_pool_start, -1);
if (ret) {
pr_err("CPU DTCM: could not add DTCM " \
"remainder to pool!\n");
@@ -219,16 +247,16 @@ static int __init setup_tcm_pool(void)
}
pr_debug("CPU DTCM: Added %08x bytes @ %08x to " \
"the TCM memory pool\n",
- DTCM_END - dtcm_pool_start + 1,
+ dtcm_end - dtcm_pool_start,
dtcm_pool_start);
}
}
/* Add the rest of ITCM to the TCM pool */
- if (tcm_status & 1) {
- if (itcm_pool_start < ITCM_END) {
+ if (tcm_status & 0x03) {
+ if (itcm_pool_start < itcm_end) {
ret = gen_pool_add(tcm_pool, itcm_pool_start,
- ITCM_END - itcm_pool_start + 1, -1);
+ itcm_end - itcm_pool_start, -1);
if (ret) {
pr_err("CPU ITCM: could not add ITCM " \
"remainder to pool!\n");
@@ -236,7 +264,7 @@ static int __init setup_tcm_pool(void)
}
pr_debug("CPU ITCM: Added %08x bytes @ %08x to " \
"the TCM memory pool\n",
- ITCM_END - itcm_pool_start + 1,
+ itcm_end - itcm_pool_start,
itcm_pool_start);
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 23:40:43 +0000