Commit b830cde5 authored by Vineet Gupta's avatar Vineet Gupta
Browse files

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: default avatarVineet Gupta <vgupta@synopsys.com>
Cc: Arnd Bergmann <arnd@arndb.de>
parent 10b12718

arch/arc/plat-arcfpga/include/plat/smp.h

+1 −0
Original line number Diff line number Diff line
@@ -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 */

arch/arc/plat-arcfpga/platform.c

+4 −0
Original line number Diff line number Diff line
@@ -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 = {

arch/arc/plat-arcfpga/smp.c

+23 −18
Original line number Diff line number Diff line
@@ -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