linux/arch/powerpc/kernel/pmc.c
Christophe Leroy c265735ff5 powerpc/85xx: Mark some functions static and add missing includes to fix no previous prototype error
corenet{32/64}_smp_defconfig leads to:

  CC      arch/powerpc/sysdev/ehv_pic.o
arch/powerpc/sysdev/ehv_pic.c:45:6: error: no previous prototype for 'ehv_pic_unmask_irq' [-Werror=missing-prototypes]
   45 | void ehv_pic_unmask_irq(struct irq_data *d)
      |      ^~~~~~~~~~~~~~~~~~
arch/powerpc/sysdev/ehv_pic.c:52:6: error: no previous prototype for 'ehv_pic_mask_irq' [-Werror=missing-prototypes]
   52 | void ehv_pic_mask_irq(struct irq_data *d)
      |      ^~~~~~~~~~~~~~~~
arch/powerpc/sysdev/ehv_pic.c:59:6: error: no previous prototype for 'ehv_pic_end_irq' [-Werror=missing-prototypes]
   59 | void ehv_pic_end_irq(struct irq_data *d)
      |      ^~~~~~~~~~~~~~~
arch/powerpc/sysdev/ehv_pic.c:66:6: error: no previous prototype for 'ehv_pic_direct_end_irq' [-Werror=missing-prototypes]
   66 | void ehv_pic_direct_end_irq(struct irq_data *d)
      |      ^~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/sysdev/ehv_pic.c:71:5: error: no previous prototype for 'ehv_pic_set_affinity' [-Werror=missing-prototypes]
   71 | int ehv_pic_set_affinity(struct irq_data *d, const struct cpumask *dest,
      |     ^~~~~~~~~~~~~~~~~~~~
arch/powerpc/sysdev/ehv_pic.c:112:5: error: no previous prototype for 'ehv_pic_set_irq_type' [-Werror=missing-prototypes]
  112 | int ehv_pic_set_irq_type(struct irq_data *d, unsigned int flow_type)
      |     ^~~~~~~~~~~~~~~~~~~~
  CC      arch/powerpc/sysdev/fsl_rio.o
arch/powerpc/sysdev/fsl_rio.c:102:5: error: no previous prototype for 'fsl_rio_mcheck_exception' [-Werror=missing-prototypes]
  102 | int fsl_rio_mcheck_exception(struct pt_regs *regs)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/sysdev/fsl_rio.c:306:5: error: no previous prototype for 'fsl_map_inb_mem' [-Werror=missing-prototypes]
  306 | int fsl_map_inb_mem(struct rio_mport *mport, dma_addr_t lstart,
      |     ^~~~~~~~~~~~~~~
arch/powerpc/sysdev/fsl_rio.c:357:6: error: no previous prototype for 'fsl_unmap_inb_mem' [-Werror=missing-prototypes]
  357 | void fsl_unmap_inb_mem(struct rio_mport *mport, dma_addr_t lstart)
      |      ^~~~~~~~~~~~~~~~~
arch/powerpc/sysdev/fsl_rio.c:445:5: error: no previous prototype for 'fsl_rio_setup' [-Werror=missing-prototypes]
  445 | int fsl_rio_setup(struct platform_device *dev)
      |     ^~~~~~~~~~~~~
  CC      arch/powerpc/sysdev/fsl_rmu.o
arch/powerpc/sysdev/fsl_rmu.c:362:6: error: no previous prototype for 'msg_unit_error_handler' [-Werror=missing-prototypes]
  362 | void msg_unit_error_handler(void)
      |      ^~~~~~~~~~~~~~~~~~~~~~
  CC      arch/powerpc/platforms/85xx/corenet_generic.o
arch/powerpc/platforms/85xx/corenet_generic.c:33:13: error: no previous prototype for 'corenet_gen_pic_init' [-Werror=missing-prototypes]
   33 | void __init corenet_gen_pic_init(void)
      |             ^~~~~~~~~~~~~~~~~~~~
arch/powerpc/platforms/85xx/corenet_generic.c:51:13: error: no previous prototype for 'corenet_gen_setup_arch' [-Werror=missing-prototypes]
   51 | void __init corenet_gen_setup_arch(void)
      |             ^~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/platforms/85xx/corenet_generic.c:104:12: error: no previous prototype for 'corenet_gen_publish_devices' [-Werror=missing-prototypes]
  104 | int __init corenet_gen_publish_devices(void)
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
  CC      arch/powerpc/platforms/85xx/qemu_e500.o
arch/powerpc/platforms/85xx/qemu_e500.c:28:13: error: no previous prototype for 'qemu_e500_pic_init' [-Werror=missing-prototypes]
   28 | void __init qemu_e500_pic_init(void)
      |             ^~~~~~~~~~~~~~~~~~
  CC      arch/powerpc/kernel/pmc.o
arch/powerpc/kernel/pmc.c:78:6: error: no previous prototype for 'power4_enable_pmcs' [-Werror=missing-prototypes]
   78 | void power4_enable_pmcs(void)
      |      ^~~~~~~~~~~~~~~~~~

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/c90780017b624b91771a3e4240dcbadc68137915.1692684784.git.christophe.leroy@csgroup.eu
2023-08-23 15:55:21 +10:00

99 lines
2.2 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* arch/powerpc/kernel/pmc.c
*
* Copyright (C) 2004 David Gibson, IBM Corporation.
* Includes code formerly from arch/ppc/kernel/perfmon.c:
* Author: Andy Fleming
* Copyright (c) 2004 Freescale Semiconductor, Inc
*/
#include <linux/errno.h>
#include <linux/bug.h>
#include <linux/spinlock.h>
#include <linux/export.h>
#include <asm/processor.h>
#include <asm/cputable.h>
#include <asm/pmc.h>
#ifndef MMCR0_PMAO
#define MMCR0_PMAO 0
#endif
static void dummy_perf(struct pt_regs *regs)
{
#if defined(CONFIG_FSL_EMB_PERFMON)
mtpmr(PMRN_PMGC0, mfpmr(PMRN_PMGC0) & ~PMGC0_PMIE);
#elif defined(CONFIG_PPC64) || defined(CONFIG_PPC_BOOK3S_32)
if (cur_cpu_spec->pmc_type == PPC_PMC_IBM)
mtspr(SPRN_MMCR0, mfspr(SPRN_MMCR0) & ~(MMCR0_PMXE|MMCR0_PMAO));
#else
mtspr(SPRN_MMCR0, mfspr(SPRN_MMCR0) & ~MMCR0_PMXE);
#endif
}
static DEFINE_RAW_SPINLOCK(pmc_owner_lock);
static void *pmc_owner_caller; /* mostly for debugging */
perf_irq_t perf_irq = dummy_perf;
int reserve_pmc_hardware(perf_irq_t new_perf_irq)
{
int err = 0;
raw_spin_lock(&pmc_owner_lock);
if (pmc_owner_caller) {
printk(KERN_WARNING "reserve_pmc_hardware: "
"PMC hardware busy (reserved by caller %p)\n",
pmc_owner_caller);
err = -EBUSY;
goto out;
}
pmc_owner_caller = __builtin_return_address(0);
perf_irq = new_perf_irq ? new_perf_irq : dummy_perf;
out:
raw_spin_unlock(&pmc_owner_lock);
return err;
}
EXPORT_SYMBOL_GPL(reserve_pmc_hardware);
void release_pmc_hardware(void)
{
raw_spin_lock(&pmc_owner_lock);
WARN_ON(! pmc_owner_caller);
pmc_owner_caller = NULL;
perf_irq = dummy_perf;
raw_spin_unlock(&pmc_owner_lock);
}
EXPORT_SYMBOL_GPL(release_pmc_hardware);
#ifdef CONFIG_PPC_BOOK3S_64
void power4_enable_pmcs(void)
{
unsigned long hid0;
hid0 = mfspr(SPRN_HID0);
hid0 |= 1UL << (63 - 20);
/* POWER4 requires the following sequence */
asm volatile(
"sync\n"
"mtspr %1, %0\n"
"mfspr %0, %1\n"
"mfspr %0, %1\n"
"mfspr %0, %1\n"
"mfspr %0, %1\n"
"mfspr %0, %1\n"
"mfspr %0, %1\n"
"isync" : "=&r" (hid0) : "i" (SPRN_HID0), "0" (hid0):
"memory");
}
#endif /* CONFIG_PPC64 */