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ARC: [Review] Multi-platform image #8: platform registers SMP callbacks 

Platforms export their SMP callbacks by populating arc_smp_ops.
The population itself needs to be done pretty early, from init_early
callback.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Vineet Gupta 2013-01-18 15:12:26 +05:30
parent 10b1271875
commit b830cde5a4
3 changed files with 28 additions and 18 deletions
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1
arch/arc/plat-arcfpga/include/plat/smp.h
View File

@ -111,6 +111,7 @@ extern void idu_irq_set_tgtcpu(uint8_t irq, uint32_t mask);
extern void idu_irq_set_mode(uint8_t irq, uint8_t dest_mode, uint8_t trig_mode);
extern void iss_model_init_smp(unsigned int cpu);
extern void iss_model_init_early_smp(void);
#endif /* CONFIG_SMP */

4
arch/arc/plat-arcfpga/platform.c
View File

@ -162,6 +162,10 @@ static void __init plat_fpga_early_init(void)
setup_bvci_lat_unit();
arc_fpga_serial_init();
#ifdef CONFIG_SMP
iss_model_init_early_smp();
#endif
}
static struct of_dev_auxdata plat_auxdata_lookup[] __initdata = {

41
arch/arc/plat-arcfpga/smp.c
View File

@ -24,25 +24,10 @@ static char smp_cpuinfo_buf[128];
*-------------------------------------------------------------------
*/
const char *arc_platform_smp_cpuinfo(void)
{
#define IS_AVAIL1(var, str) ((var) ? str : "")
struct bcr_mp mp;
READ_BCR(ARC_REG_MP_BCR, mp);
sprintf(smp_cpuinfo_buf, "Extn [700-SMP]: v%d, arch(%d) %s %s %s\n",
mp.ver, mp.mp_arch, IS_AVAIL1(mp.scu, "SCU"),
IS_AVAIL1(mp.idu, "IDU"), IS_AVAIL1(mp.sdu, "SDU"));
return smp_cpuinfo_buf;
}
/*
* Master kick starting another CPU
*/
void arc_platform_smp_wakeup_cpu(int cpu, unsigned long pc)
static void iss_model_smp_wakeup_cpu(int cpu, unsigned long pc)
{
/* setup the start PC */
write_aux_reg(ARC_AUX_XTL_REG_PARAM, pc);
@ -103,19 +88,39 @@ void iss_model_init_smp(unsigned int cpu)
smp_ipi_irq_setup(cpu, IDU_INTERRUPT_0 + cpu);
}
void arc_platform_ipi_send(const struct cpumask *callmap)
static void iss_model_ipi_send(void *arg)
{
struct cpumask *callmap = arg;
unsigned int cpu;
for_each_cpu(cpu, callmap)
idu_irq_assert(cpu);
}
void arc_platform_ipi_clear(int cpu, int irq)
static void iss_model_ipi_clear(int cpu, int irq)
{
idu_irq_clear(IDU_INTERRUPT_0 + cpu);
}
void iss_model_init_early_smp(void)
{
#define IS_AVAIL1(var, str) ((var) ? str : "")
struct bcr_mp mp;
READ_BCR(ARC_REG_MP_BCR, mp);
sprintf(smp_cpuinfo_buf, "Extn [ISS-SMP]: v%d, arch(%d) %s %s %s\n",
mp.ver, mp.mp_arch, IS_AVAIL1(mp.scu, "SCU"),
IS_AVAIL1(mp.idu, "IDU"), IS_AVAIL1(mp.sdu, "SDU"));
plat_smp_ops.info = smp_cpuinfo_buf;
plat_smp_ops.cpu_kick = iss_model_smp_wakeup_cpu;
plat_smp_ops.ipi_send = iss_model_ipi_send;
plat_smp_ops.ipi_clear = iss_model_ipi_clear;
}
/*
*-------------------------------------------------------------------
* Low level Platform IPI Providers