ARM: 6771/1: vexpress: add support for multiple core tiles
The current Versatile Express BSP defines the MACHINE_START macro
in the core tile code.
This patch moves this into the generic board code and introduces a
method for determining the current tile at runtime, allowing the
Kernel to have support for multiple tiles compiled in. Tile-specific
functions are executed via a descriptor struct containing the correct
implementations for the current tile.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-vexpress/platsmp.c b/arch/arm/mach-vexpress/platsmp.c
index 1892702..2b5f7ac 100644
--- a/arch/arm/mach-vexpress/platsmp.c
+++ b/arch/arm/mach-vexpress/platsmp.c
@@ -13,10 +13,8 @@
#include <linux/smp.h>
#include <linux/io.h>
-#include <asm/smp_scu.h>
#include <asm/unified.h>
-#include <mach/ct-ca9x4.h>
#include <mach/motherboard.h>
#define V2M_PA_CS7 0x10000000
@@ -24,47 +22,22 @@
extern void versatile_secondary_startup(void);
-static void __iomem *scu_base_addr(void)
-{
- return MMIO_P2V(A9_MPCORE_SCU);
-}
-
/*
* Initialise the CPU possible map early - this describes the CPUs
* which may be present or become present in the system.
*/
void __init smp_init_cpus(void)
{
- void __iomem *scu_base = scu_base_addr();
- unsigned int i, ncores;
-
- ncores = scu_base ? scu_get_core_count(scu_base) : 1;
-
- /* sanity check */
- if (ncores > NR_CPUS) {
- printk(KERN_WARNING
- "vexpress: no. of cores (%d) greater than configured "
- "maximum of %d - clipping\n",
- ncores, NR_CPUS);
- ncores = NR_CPUS;
- }
-
- for (i = 0; i < ncores; i++)
- set_cpu_possible(i, true);
+ ct_desc->init_cpu_map();
}
void __init platform_smp_prepare_cpus(unsigned int max_cpus)
{
- int i;
-
/*
* Initialise the present map, which describes the set of CPUs
* actually populated at the present time.
*/
- for (i = 0; i < max_cpus; i++)
- set_cpu_present(i, true);
-
- scu_enable(scu_base_addr());
+ ct_desc->smp_enable(max_cpus);
/*
* Write the address of secondary startup into the