arm: socfpga: Add SMP support for actual socfpga harware
Because the CPU1 start address is different for socfpga-vt and
socfpga-cyclone5, we add code to use the correct CPU1 start addr.
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Signed-off-by: Pavel Machek <pavel@denx.de>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Olof Johansson <olof@lixom.net>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Olof Johansson <olof@lixom.net>
diff --git a/arch/arm/mach-socfpga/core.h b/arch/arm/mach-socfpga/core.h
index 9941caa..315edff 100644
--- a/arch/arm/mach-socfpga/core.h
+++ b/arch/arm/mach-socfpga/core.h
@@ -20,7 +20,7 @@
#ifndef __MACH_CORE_H
#define __MACH_CORE_H
-extern void secondary_startup(void);
+extern void socfpga_secondary_startup(void);
extern void __iomem *socfpga_scu_base_addr;
extern void socfpga_init_clocks(void);
@@ -29,6 +29,8 @@
extern struct smp_operations socfpga_smp_ops;
extern char secondary_trampoline, secondary_trampoline_end;
+extern unsigned long cpu1start_addr;
+
#define SOCFPGA_SCU_VIRT_BASE 0xfffec000
#endif
diff --git a/arch/arm/mach-socfpga/headsmp.S b/arch/arm/mach-socfpga/headsmp.S
index f09b128..9004bfb 100644
--- a/arch/arm/mach-socfpga/headsmp.S
+++ b/arch/arm/mach-socfpga/headsmp.S
@@ -13,13 +13,21 @@
__CPUINIT
.arch armv7-a
-#define CPU1_START_ADDR 0xffd08010
-
ENTRY(secondary_trampoline)
- movw r0, #:lower16:CPU1_START_ADDR
- movt r0, #:upper16:CPU1_START_ADDR
+ movw r2, #:lower16:cpu1start_addr
+ movt r2, #:upper16:cpu1start_addr
+ /* The socfpga VT cannot handle a 0xC0000000 page offset when loading
+ the cpu1start_addr, we bit clear it. Tested on HW and VT. */
+ bic r2, r2, #0x40000000
+
+ ldr r0, [r2]
ldr r1, [r0]
bx r1
ENTRY(secondary_trampoline_end)
+
+ENTRY(socfpga_secondary_startup)
+ bl v7_invalidate_l1
+ b secondary_startup
+ENDPROC(socfpga_secondary_startup)
diff --git a/arch/arm/mach-socfpga/platsmp.c b/arch/arm/mach-socfpga/platsmp.c
index 68dd1b6..2481968 100644
--- a/arch/arm/mach-socfpga/platsmp.c
+++ b/arch/arm/mach-socfpga/platsmp.c
@@ -47,16 +47,19 @@
{
int trampoline_size = &secondary_trampoline_end - &secondary_trampoline;
- memcpy(phys_to_virt(0), &secondary_trampoline, trampoline_size);
+ if (cpu1start_addr) {
+ memcpy(phys_to_virt(0), &secondary_trampoline, trampoline_size);
- __raw_writel(virt_to_phys(secondary_startup), (sys_manager_base_addr+0x10));
+ __raw_writel(virt_to_phys(socfpga_secondary_startup),
+ (sys_manager_base_addr + (cpu1start_addr & 0x000000ff)));
- flush_cache_all();
- smp_wmb();
- outer_clean_range(0, trampoline_size);
+ flush_cache_all();
+ smp_wmb();
+ outer_clean_range(0, trampoline_size);
- /* This will release CPU #1 out of reset.*/
- __raw_writel(0, rst_manager_base_addr + 0x10);
+ /* This will release CPU #1 out of reset.*/
+ __raw_writel(0, rst_manager_base_addr + 0x10);
+ }
return 0;
}
diff --git a/arch/arm/mach-socfpga/socfpga.c b/arch/arm/mach-socfpga/socfpga.c
index 94aa6ad..cec1266 100644
--- a/arch/arm/mach-socfpga/socfpga.c
+++ b/arch/arm/mach-socfpga/socfpga.c
@@ -29,6 +29,7 @@
void __iomem *socfpga_scu_base_addr = ((void __iomem *)(SOCFPGA_SCU_VIRT_BASE));
void __iomem *sys_manager_base_addr;
void __iomem *rst_manager_base_addr;
+unsigned long cpu1start_addr;
static struct map_desc scu_io_desc __initdata = {
.virtual = SOCFPGA_SCU_VIRT_BASE,
@@ -72,6 +73,11 @@
struct device_node *np;
np = of_find_compatible_node(NULL, NULL, "altr,sys-mgr");
+
+ if (of_property_read_u32(np, "cpu1-start-addr",
+ (u32 *) &cpu1start_addr))
+ pr_err("SMP: Need cpu1-start-addr in device tree.\n");
+
sys_manager_base_addr = of_iomap(np, 0);
np = of_find_compatible_node(NULL, NULL, "altr,rst-mgr");