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authorDavid Daney <ddaney@caviumnetworks.com>2010-07-23 10:57:51 -0700
committerRalf Baechle <ralf@linux-mips.org>2010-08-05 13:26:12 +0100
commitbabba4f11379fb3804de802a3d0bc6b96c59d547 (patch)
treed64a578bc2999c286518158d738e7c9d909f469f /arch/mips/cavium-octeon
parent442f201286bfbbcd5ba5acb616914004be3e6268 (diff)
MIPS: Octeon: HOTPLUG_CPU fixes.
* Rename camel-case InitTLBStart_addr to octeon_bootloader_entry_addr. * Convert calls to cvmx_read64_uint32(), to simple pointer dereferences. * Set proper ebase. * Don't confuse coreid and cpu numbers. * Try to maintain consistent bootloader coremask. * Update the signature and boot_init_vector of supported bootloaders. Signed-off-by: David Daney <ddaney@caviumnetworks.com> To: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1491/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/cavium-octeon')
-rw-r--r--arch/mips/cavium-octeon/octeon_boot.h16
-rw-r--r--arch/mips/cavium-octeon/smp.c125
2 files changed, 63 insertions, 78 deletions
diff --git a/arch/mips/cavium-octeon/octeon_boot.h b/arch/mips/cavium-octeon/octeon_boot.h
index 0f7f84accf9..428864b2ba4 100644
--- a/arch/mips/cavium-octeon/octeon_boot.h
+++ b/arch/mips/cavium-octeon/octeon_boot.h
@@ -23,14 +23,16 @@
#include <linux/types.h>
struct boot_init_vector {
- uint32_t stack_addr;
- uint32_t code_addr;
+ /* First stage address - in ram instead of flash */
+ uint64_t code_addr;
+ /* Setup code for application, NOT application entry point */
uint32_t app_start_func_addr;
+ /* k0 is used for global data - needs to be passed to other cores */
uint32_t k0_val;
- uint32_t flags;
- uint32_t boot_info_addr;
+ /* Address of boot info block structure */
+ uint64_t boot_info_addr;
+ uint32_t flags; /* flags */
uint32_t pad;
- uint32_t pad2;
};
/* similar to bootloader's linux_app_boot_info but without global data */
@@ -40,7 +42,7 @@ struct linux_app_boot_info {
uint32_t avail_coremask;
uint32_t pci_console_active;
uint32_t icache_prefetch_disable;
- uint32_t InitTLBStart_addr;
+ uint64_t InitTLBStart_addr;
uint32_t start_app_addr;
uint32_t cur_exception_base;
uint32_t no_mark_private_data;
@@ -58,7 +60,7 @@ struct linux_app_boot_info {
#define LINUX_APP_BOOT_BLOCK_NAME "linux-app-boot"
-#define LABI_SIGNATURE 0xAABBCCDD
+#define LABI_SIGNATURE 0xAABBCC01
/* from uboot-headers/octeon_mem_map.h */
#define EXCEPTION_BASE_INCR (4 * 1024)
diff --git a/arch/mips/cavium-octeon/smp.c b/arch/mips/cavium-octeon/smp.c
index ceb76496e6a..391cefe556b 100644
--- a/arch/mips/cavium-octeon/smp.c
+++ b/arch/mips/cavium-octeon/smp.c
@@ -27,7 +27,8 @@ volatile unsigned long octeon_processor_sp;
volatile unsigned long octeon_processor_gp;
#ifdef CONFIG_HOTPLUG_CPU
-static unsigned int InitTLBStart_addr;
+uint64_t octeon_bootloader_entry_addr;
+EXPORT_SYMBOL(octeon_bootloader_entry_addr);
#endif
static irqreturn_t mailbox_interrupt(int irq, void *dev_id)
@@ -80,20 +81,13 @@ static inline void octeon_send_ipi_mask(const struct cpumask *mask,
static void octeon_smp_hotplug_setup(void)
{
#ifdef CONFIG_HOTPLUG_CPU
- uint32_t labi_signature;
-
- labi_signature =
- cvmx_read64_uint32(CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
- LABI_ADDR_IN_BOOTLOADER +
- offsetof(struct linux_app_boot_info,
- labi_signature)));
- if (labi_signature != LABI_SIGNATURE)
- pr_err("The bootloader version on this board is incorrect\n");
- InitTLBStart_addr =
- cvmx_read64_uint32(CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
- LABI_ADDR_IN_BOOTLOADER +
- offsetof(struct linux_app_boot_info,
- InitTLBStart_addr)));
+ struct linux_app_boot_info *labi;
+
+ labi = (struct linux_app_boot_info *)PHYS_TO_XKSEG_CACHED(LABI_ADDR_IN_BOOTLOADER);
+ if (labi->labi_signature != LABI_SIGNATURE)
+ panic("The bootloader version on this board is incorrect.");
+
+ octeon_bootloader_entry_addr = labi->InitTLBStart_addr;
#endif
}
@@ -181,18 +175,21 @@ static void octeon_init_secondary(void)
{
const int coreid = cvmx_get_core_num();
union cvmx_ciu_intx_sum0 interrupt_enable;
+ unsigned int sr;
#ifdef CONFIG_HOTPLUG_CPU
- unsigned int cur_exception_base;
-
- cur_exception_base = cvmx_read64_uint32(
- CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
- LABI_ADDR_IN_BOOTLOADER +
- offsetof(struct linux_app_boot_info,
- cur_exception_base)));
- /* cur_exception_base is incremented in bootloader after setting */
- write_c0_ebase((unsigned int)(cur_exception_base - EXCEPTION_BASE_INCR));
+ struct linux_app_boot_info *labi;
+
+ labi = (struct linux_app_boot_info *)PHYS_TO_XKSEG_CACHED(LABI_ADDR_IN_BOOTLOADER);
+
+ if (labi->labi_signature != LABI_SIGNATURE)
+ panic("The bootloader version on this board is incorrect.");
#endif
+
+ sr = set_c0_status(ST0_BEV);
+ write_c0_ebase((u32)ebase);
+ write_c0_status(sr);
+
octeon_check_cpu_bist();
octeon_init_cvmcount();
/*
@@ -299,8 +296,8 @@ static int octeon_cpu_disable(void)
static void octeon_cpu_die(unsigned int cpu)
{
int coreid = cpu_logical_map(cpu);
- uint32_t avail_coremask;
- struct cvmx_bootmem_named_block_desc *block_desc;
+ uint32_t mask, new_mask;
+ const struct cvmx_bootmem_named_block_desc *block_desc;
while (per_cpu(cpu_state, cpu) != CPU_DEAD)
cpu_relax();
@@ -309,52 +306,40 @@ static void octeon_cpu_die(unsigned int cpu)
* This is a bit complicated strategics of getting/settig available
* cores mask, copied from bootloader
*/
+
+ mask = 1 << coreid;
/* LINUX_APP_BOOT_BLOCK is initialized in bootoct binary */
block_desc = cvmx_bootmem_find_named_block(LINUX_APP_BOOT_BLOCK_NAME);
if (!block_desc) {
- avail_coremask =
- cvmx_read64_uint32(CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
- LABI_ADDR_IN_BOOTLOADER +
- offsetof
- (struct linux_app_boot_info,
- avail_coremask)));
- } else { /* alternative, already initialized */
- avail_coremask =
- cvmx_read64_uint32(CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
- block_desc->base_addr +
- AVAIL_COREMASK_OFFSET_IN_LINUX_APP_BOOT_BLOCK));
- }
+ struct linux_app_boot_info *labi;
- avail_coremask |= 1 << coreid;
+ labi = (struct linux_app_boot_info *)PHYS_TO_XKSEG_CACHED(LABI_ADDR_IN_BOOTLOADER);
- /* Setting avail_coremask for bootoct binary */
- if (!block_desc) {
- cvmx_write64_uint32(CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
- LABI_ADDR_IN_BOOTLOADER +
- offsetof(struct linux_app_boot_info,
- avail_coremask)),
- avail_coremask);
- } else {
- cvmx_write64_uint32(CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
- block_desc->base_addr +
- AVAIL_COREMASK_OFFSET_IN_LINUX_APP_BOOT_BLOCK),
- avail_coremask);
+ labi->avail_coremask |= mask;
+ new_mask = labi->avail_coremask;
+ } else { /* alternative, already initialized */
+ uint32_t *p = (uint32_t *)PHYS_TO_XKSEG_CACHED(block_desc->base_addr +
+ AVAIL_COREMASK_OFFSET_IN_LINUX_APP_BOOT_BLOCK);
+ *p |= mask;
+ new_mask = *p;
}
- pr_info("Reset core %d. Available Coremask = %x\n", coreid,
- avail_coremask);
+ pr_info("Reset core %d. Available Coremask = 0x%x \n", coreid, new_mask);
+ mb();
cvmx_write_csr(CVMX_CIU_PP_RST, 1 << coreid);
cvmx_write_csr(CVMX_CIU_PP_RST, 0);
}
void play_dead(void)
{
- int coreid = cvmx_get_core_num();
+ int cpu = cpu_number_map(cvmx_get_core_num());
idle_task_exit();
octeon_processor_boot = 0xff;
- per_cpu(cpu_state, coreid) = CPU_DEAD;
+ per_cpu(cpu_state, cpu) = CPU_DEAD;
+
+ mb();
while (1) /* core will be reset here */
;
@@ -367,29 +352,27 @@ static void start_after_reset(void)
kernel_entry(0, 0, 0); /* set a2 = 0 for secondary core */
}
-int octeon_update_boot_vector(unsigned int cpu)
+static int octeon_update_boot_vector(unsigned int cpu)
{
int coreid = cpu_logical_map(cpu);
- unsigned int avail_coremask;
- struct cvmx_bootmem_named_block_desc *block_desc;
+ uint32_t avail_coremask;
+ const struct cvmx_bootmem_named_block_desc *block_desc;
struct boot_init_vector *boot_vect =
- (struct boot_init_vector *) cvmx_phys_to_ptr(0x0 +
- BOOTLOADER_BOOT_VECTOR);
+ (struct boot_init_vector *)PHYS_TO_XKSEG_CACHED(BOOTLOADER_BOOT_VECTOR);
block_desc = cvmx_bootmem_find_named_block(LINUX_APP_BOOT_BLOCK_NAME);
if (!block_desc) {
- avail_coremask =
- cvmx_read64_uint32(CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
- LABI_ADDR_IN_BOOTLOADER +
- offsetof(struct linux_app_boot_info,
- avail_coremask)));
+ struct linux_app_boot_info *labi;
+
+ labi = (struct linux_app_boot_info *)PHYS_TO_XKSEG_CACHED(LABI_ADDR_IN_BOOTLOADER);
+
+ avail_coremask = labi->avail_coremask;
+ labi->avail_coremask &= ~(1 << coreid);
} else { /* alternative, already initialized */
- avail_coremask =
- cvmx_read64_uint32(CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
- block_desc->base_addr +
- AVAIL_COREMASK_OFFSET_IN_LINUX_APP_BOOT_BLOCK));
+ avail_coremask = *(uint32_t *)PHYS_TO_XKSEG_CACHED(
+ block_desc->base_addr + AVAIL_COREMASK_OFFSET_IN_LINUX_APP_BOOT_BLOCK);
}
if (!(avail_coremask & (1 << coreid))) {
@@ -400,9 +383,9 @@ int octeon_update_boot_vector(unsigned int cpu)
boot_vect[coreid].app_start_func_addr =
(uint32_t) (unsigned long) start_after_reset;
- boot_vect[coreid].code_addr = InitTLBStart_addr;
+ boot_vect[coreid].code_addr = octeon_bootloader_entry_addr;
- CVMX_SYNC;
+ mb();
cvmx_write_csr(CVMX_CIU_NMI, (1 << coreid) & avail_coremask);