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firmware: qcom: scm: Clean cold boot entry to export only the API 

We dont need to export the SCM specific cold boot flags to the platform
code. Export only a function to set the cold boot address.

Signed-off-by: Lina Iyer <lina.iyer@linaro.org>
Signed-off-by: Kumar Gala <galak@codeaurora.org>
hifive-unleashed-5.1
Lina Iyer 2015-03-02 16:30:28 -07:00 committed by Kumar Gala
parent 916f743da3
commit a353e4a06f
3 changed files with 43 additions and 24 deletions
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21
arch/arm/mach-qcom/platsmp.c
View File

@ -319,25 +319,10 @@ static int kpssv2_boot_secondary(unsigned int cpu, struct task_struct *idle)
static void __init qcom_smp_prepare_cpus(unsigned int max_cpus)
{
int cpu, map;
unsigned int flags = 0;
static const int cold_boot_flags[] = {
0,
QCOM_SCM_FLAG_COLDBOOT_CPU1,
QCOM_SCM_FLAG_COLDBOOT_CPU2,
QCOM_SCM_FLAG_COLDBOOT_CPU3,
};
int cpu;
for_each_present_cpu(cpu) {
map = cpu_logical_map(cpu);
if (WARN_ON(map >= ARRAY_SIZE(cold_boot_flags))) {
set_cpu_present(cpu, false);
continue;
}
flags |= cold_boot_flags[map];
}
if (qcom_scm_set_boot_addr(virt_to_phys(secondary_startup_arm), flags)) {
if (qcom_scm_set_cold_boot_addr(secondary_startup_arm,
cpu_present_mask)) {
for_each_present_cpu(cpu) {
if (cpu == smp_processor_id())
continue;

41
drivers/firmware/qcom_scm.c
View File

@ -34,6 +34,11 @@
#define QCOM_SCM_ERROR -1
#define QCOM_SCM_INTERRUPTED 1
#define QCOM_SCM_FLAG_COLDBOOT_CPU0 0x00
#define QCOM_SCM_FLAG_COLDBOOT_CPU1 0x01
#define QCOM_SCM_FLAG_COLDBOOT_CPU2 0x08
#define QCOM_SCM_FLAG_COLDBOOT_CPU3 0x20
static DEFINE_MUTEX(qcom_scm_lock);
/**
@ -329,7 +334,7 @@ EXPORT_SYMBOL(qcom_scm_get_version);
/*
* Set the cold/warm boot address for one of the CPU cores.
*/
int qcom_scm_set_boot_addr(u32 addr, int flags)
static int qcom_scm_set_boot_addr(u32 addr, int flags)
{
struct {
__le32 flags;
@ -341,4 +346,36 @@ int qcom_scm_set_boot_addr(u32 addr, int flags)
return qcom_scm_call(QCOM_SCM_SVC_BOOT, QCOM_SCM_BOOT_ADDR,
&cmd, sizeof(cmd), NULL, 0);
}
EXPORT_SYMBOL(qcom_scm_set_boot_addr);
/**
* qcom_scm_set_cold_boot_addr() - Set the cold boot address for cpus
* @entry: Entry point function for the cpus
* @cpus: The cpumask of cpus that will use the entry point
*
* Set the cold boot address of the cpus. Any cpu outside the supported
* range would be removed from the cpu present mask.
*/
int qcom_scm_set_cold_boot_addr(void *entry, const cpumask_t *cpus)
{
int flags = 0;
int cpu;
int scm_cb_flags[] = {
QCOM_SCM_FLAG_COLDBOOT_CPU0,
QCOM_SCM_FLAG_COLDBOOT_CPU1,
QCOM_SCM_FLAG_COLDBOOT_CPU2,
QCOM_SCM_FLAG_COLDBOOT_CPU3,
};
if (!cpus || (cpus && cpumask_empty(cpus)))
return -EINVAL;
for_each_cpu(cpu, cpus) {
if (cpu < ARRAY_SIZE(scm_cb_flags))
flags |= scm_cb_flags[cpu];
else
set_cpu_present(cpu, false);
}
return qcom_scm_set_boot_addr(virt_to_phys(entry), flags);
}
EXPORT_SYMBOL(qcom_scm_set_cold_boot_addr);

5
include/linux/qcom_scm.h
View File

@ -12,15 +12,12 @@
#ifndef __QCOM_SCM_H
#define __QCOM_SCM_H
#define QCOM_SCM_FLAG_COLDBOOT_CPU1 0x01
#define QCOM_SCM_FLAG_COLDBOOT_CPU2 0x08
#define QCOM_SCM_FLAG_COLDBOOT_CPU3 0x20
#define QCOM_SCM_FLAG_WARMBOOT_CPU0 0x04
#define QCOM_SCM_FLAG_WARMBOOT_CPU1 0x02
#define QCOM_SCM_FLAG_WARMBOOT_CPU2 0x10
#define QCOM_SCM_FLAG_WARMBOOT_CPU3 0x40
extern int qcom_scm_set_boot_addr(u32 addr, int flags);
extern int qcom_scm_set_cold_boot_addr(void *entry, const cpumask_t *cpus);
#define QCOM_SCM_VERSION(major, minor) (((major) << 16) | ((minor) & 0xFF))