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Commit bb603277 authored by Joseph Lo's avatar Joseph Lo Committed by Stephen Warren
Browse files

ARM: tegra: replace the CPU CAR access code by tegra_cpu_car_ops 



Replacing the code that directly access to CAR registers with
tegra_cpu_car_ops. This ops hides CPU CAR access inside and
provides control interface for it.

Signed-off-by: default avatarJoseph Lo <josephl@nvidia.com>
Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
parent dab403ef

arch/arm/mach-tegra/platsmp.c

+5 −24
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ 
#include "fuse.h"

#include "flowctrl.h"

#include "reset.h"

#include "tegra_cpu_car.h"



extern void tegra_secondary_startup(void);
@@ -38,17 +39,6 @@ static void __iomem *scu_base = IO_ADDRESS(TEGRA_ARM_PERIF_BASE); 


#define EVP_CPU_RESET_VECTOR \

	(IO_ADDRESS(TEGRA_EXCEPTION_VECTORS_BASE) + 0x100)

#define CLK_RST_CONTROLLER_CLK_CPU_CMPLX \

	(IO_ADDRESS(TEGRA_CLK_RESET_BASE) + 0x4c)

#define CLK_RST_CONTROLLER_RST_CPU_CMPLX_SET \

	(IO_ADDRESS(TEGRA_CLK_RESET_BASE) + 0x340)

#define CLK_RST_CONTROLLER_RST_CPU_CMPLX_CLR \

	(IO_ADDRESS(TEGRA_CLK_RESET_BASE) + 0x344)

#define CLK_RST_CONTROLLER_CLK_CPU_CMPLX_CLR \

	(IO_ADDRESS(TEGRA_CLK_RESET_BASE) + 0x34c)



#define CPU_CLOCK(cpu)	(0x1<<(8+cpu))

#define CPU_RESET(cpu)	(0x1111ul<<(cpu))



void __cpuinit platform_secondary_init(unsigned int cpu)

{
@@ -63,13 +53,8 @@ void __cpuinit platform_secondary_init(unsigned int cpu) 


static int tegra20_power_up_cpu(unsigned int cpu)

{

	u32 reg;



	/* Enable the CPU clock. */

	reg = readl(CLK_RST_CONTROLLER_CLK_CPU_CMPLX);

	writel(reg & ~CPU_CLOCK(cpu), CLK_RST_CONTROLLER_CLK_CPU_CMPLX);

	barrier();

	reg = readl(CLK_RST_CONTROLLER_CLK_CPU_CMPLX);

	tegra_enable_cpu_clock(cpu);



	/* Clear flow controller CSR. */

	flowctrl_write_cpu_csr(cpu, 0);
@@ -79,7 +64,6 @@ static int tegra20_power_up_cpu(unsigned int cpu) 


static int tegra30_power_up_cpu(unsigned int cpu)

{

	u32 reg;

	int ret, pwrgateid;

	unsigned long timeout;
@@ -103,8 +87,7 @@ static int tegra30_power_up_cpu(unsigned int cpu) 
	}



	/* CPU partition is powered. Enable the CPU clock. */

	writel(CPU_CLOCK(cpu), CLK_RST_CONTROLLER_CLK_CPU_CMPLX_CLR);

	reg = readl(CLK_RST_CONTROLLER_CLK_CPU_CMPLX_CLR);

	tegra_enable_cpu_clock(cpu);

	udelay(10);



	/* Remove I/O clamps. */
@@ -128,8 +111,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle) 
	 * via the flow controller). This will have no effect on first boot

	 * of the CPU since it should already be in reset.

	 */

	writel(CPU_RESET(cpu), CLK_RST_CONTROLLER_RST_CPU_CMPLX_SET);

	dmb();

	tegra_put_cpu_in_reset(cpu);



	/*

	 * Unhalt the CPU. If the flow controller was used to power-gate the
@@ -155,8 +137,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle) 
		goto done;



	/* Take the CPU out of reset. */

	writel(CPU_RESET(cpu), CLK_RST_CONTROLLER_RST_CPU_CMPLX_CLR);

	wmb();

	tegra_cpu_out_of_reset(cpu);

done:

	return status;

}