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/* $Id: ppc.c,v 1.20 2007/10/06 13:02:07 mikpe Exp $
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* PPC32-specific perfctr library procedures.
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*
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* Copyright (C) 2004-2007 Mikael Pettersson
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*/
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#include <errno.h>
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#include <asm/unistd.h>
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#include <stdio.h>
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#include <string.h> /* memset() */
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#include "libperfctr.h"
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#include "ppc.h"
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static unsigned int __NR_vperfctr_open;
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#define __NR_vperfctr_control (__NR_vperfctr_open+1)
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#define __NR_vperfctr_write (__NR_vperfctr_open+2)
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#define __NR_vperfctr_read (__NR_vperfctr_open+3)
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#include <unistd.h>
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static void init_sys_vperfctr(void)
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{
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if (!__NR_vperfctr_open) {
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unsigned int nr;
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unsigned int kver = perfctr_linux_version_code();
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if (kver >= PERFCTR_KERNEL_VERSION(2,6,18))
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nr = 310;
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else if (kver >= PERFCTR_KERNEL_VERSION(2,6,16))
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nr = 301;
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else
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nr = 280;
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__NR_vperfctr_open = nr;
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}
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}
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/*
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* The actual syscalls.
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*/
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int _sys_vperfctr_open(int fd_unused, int tid, int creat)
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{
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init_sys_vperfctr();
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return syscall(__NR_vperfctr_open, tid, creat);
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}
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static int _sys_vperfctr_control(int fd, unsigned int cmd)
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{
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init_sys_vperfctr();
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return syscall(__NR_vperfctr_control, fd, cmd);
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}
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static int _sys_vperfctr_write(int fd, unsigned int domain, const void *arg, unsigned int argbytes)
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{
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init_sys_vperfctr();
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return syscall(__NR_vperfctr_write, fd, domain, arg, argbytes);
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}
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static int _sys_vperfctr_read(int fd, unsigned int domain, void *arg, unsigned int argbytes)
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{
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init_sys_vperfctr();
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return syscall(__NR_vperfctr_read, fd, domain, arg, argbytes);
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}
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/*
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* Simple syscall wrappers.
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*/
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int _sys_vperfctr_read_sum(int fd, struct perfctr_sum_ctrs *arg)
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{
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return _sys_vperfctr_read(fd, VPERFCTR_DOMAIN_SUM, arg, sizeof(*arg));
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}
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int _sys_vperfctr_read_children(int fd, struct perfctr_sum_ctrs *arg)
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{
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return _sys_vperfctr_read(fd, VPERFCTR_DOMAIN_CHILDREN, arg, sizeof(*arg));
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}
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int _sys_vperfctr_unlink(int fd)
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{
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return _sys_vperfctr_control(fd, VPERFCTR_CONTROL_UNLINK);
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}
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int _sys_vperfctr_iresume(int fd)
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{
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return _sys_vperfctr_control(fd, VPERFCTR_CONTROL_RESUME);
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}
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/*
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* Complex syscall wrappers, for transmitting control data
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* in CPU family specific formats.
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*/
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#define SPRN_MMCR0 0x3B8 /* Monitor Mode Control Register 0 (604 and up) */
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#define SPRN_MMCR1 0x3BC /* Monitor Mode Control Register 1 (604e and up) */
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#define SPRN_MMCR2 0x3B0 /* Monitor Mode Control Register 2 (7400 and up) */
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#define SPRN_PMC1 0x3B9 /* Performance Counter Register 1 (604 and up) */
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#define SPRN_PMC2 0x3BA /* Performance Counter Register 2 (604 and up) */
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#define SPRN_PMC3 0x3BD /* Performance Counter Register 3 (604e and up) */
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#define SPRN_PMC4 0x3BE /* Performance Counter Register 4 (604e and up) */
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#define SPRN_PMC5 0x3B1 /* Performance Counter Register 5 (7450 and up) */
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#define SPRN_PMC6 0x3B2 /* Performance Counter Register 6 (7450 and up) */
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#define MMCR0_PMC1SEL 0x00001FC0 /* PMC1 event selector, 7 bits. */
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#define MMCR0_PMC2SEL 0x0000003F /* PMC2 event selector, 6 bits. */
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#if 0
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static void show_regs(const struct perfctr_cpu_reg *regs, unsigned int n)
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{
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unsigned int i;
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fprintf(stderr, "CPU Register Values:\n");
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for(i = 0; i < n; ++i)
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fprintf(stderr, "SPR %#x\t0x%08x\n", regs[i].nr, regs[i].value);
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}
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#else
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#define show_regs(regs, n) do{}while(0)
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#endif
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static int read_packet(int fd, unsigned int domain, void *arg, unsigned int argbytes)
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{
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int ret;
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ret = _sys_vperfctr_read(fd, domain, arg, argbytes);
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if (ret != argbytes && ret >= 0) {
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errno = EPROTO;
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return -1;
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}
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return ret;
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}
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static unsigned int pmc_to_spr(unsigned int pmc)
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{
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switch (pmc) {
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default: /* impossible, but silences gcc warning */
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case (1-1): return SPRN_PMC1;
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case (2-1): return SPRN_PMC2;
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case (3-1): return SPRN_PMC3;
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case (4-1): return SPRN_PMC4;
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case (5-1): return SPRN_PMC5;
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case (6-1): return SPRN_PMC6;
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}
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}
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static int write_cpu_regs(int fd, const struct perfctr_cpu_control *control)
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{
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struct perfctr_cpu_reg regs[3+6];
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unsigned int evntsel[6];
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unsigned int nrctrs, nractrs, pmc_mask, nr_regs, i, pmc;
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nractrs = control->nractrs;
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nrctrs = nractrs + control->nrictrs;
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if (nrctrs < nractrs || nrctrs > 6) {
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errno = EINVAL;
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return -1;
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}
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if (!nrctrs)
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return 0;
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nr_regs = 0;
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pmc_mask = 0;
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memset(evntsel, 0, sizeof evntsel);
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for(i = 0; i < nrctrs; ++i) {
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pmc = control->pmc_map[i];
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if (pmc >= 6 || (pmc_mask & (1<
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errno = EINVAL;
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return -1;
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}
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pmc_mask |= (1<
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evntsel[pmc] = control->evntsel[i];
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if (i >= nractrs) {
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unsigned int j = 3 + (i - nractrs);
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regs[j].nr = pmc_to_spr(pmc);
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regs[j].value = control->ireset[i];
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}
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}
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regs[0].nr = SPRN_MMCR0;
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regs[0].value = (control->ppc.mmcr0
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| (evntsel[1-1] << (31-25))
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| (evntsel[2-1] << (31-31)));
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regs[1].nr = SPRN_MMCR1;
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regs[1].value = (( evntsel[3-1] << (31-4))
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| (evntsel[4-1] << (31-9))
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| (evntsel[5-1] << (31-14))
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| (evntsel[6-1] << (31-20)));
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regs[2].nr = SPRN_MMCR2;
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regs[2].value = control->ppc.mmcr2;
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nr_regs = 3 + (nrctrs - nractrs);
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show_regs(regs, nr_regs);
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return _sys_vperfctr_write(fd, PERFCTR_DOMAIN_CPU_REGS, regs, nr_regs*sizeof(regs[0]));
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}
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static int read_cpu_regs(int fd, struct perfctr_cpu_control *control)
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{
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struct perfctr_cpu_reg regs[3+6];
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unsigned int evntsel[6];
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unsigned int nrctrs, nractrs, pmc_mask, nr_regs, i, pmc;
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int ret;
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nractrs = control->nractrs;
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nrctrs = nractrs + control->nrictrs;
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if (nrctrs < nractrs || nrctrs > 6) {
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errno = EINVAL;
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return -1;
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}
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if (!nrctrs)
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return 0;
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nr_regs = 0;
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pmc_mask = 0;
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for(i = 0; i < nrctrs; ++i) {
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pmc = control->pmc_map[i];
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if (pmc >= 6 || (pmc_mask & (1<
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errno = EINVAL;
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return -1;
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}
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pmc_mask |= (1<
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if (i >= nractrs) {
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unsigned int j = 3 + (i - nractrs);
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regs[j].nr = pmc_to_spr(pmc);
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}
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}
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regs[0].nr = SPRN_MMCR0;
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regs[1].nr = SPRN_MMCR1;
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regs[2].nr = SPRN_MMCR2;
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nr_regs = 3 + (nrctrs - nractrs);
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ret = read_packet(fd, PERFCTR_DOMAIN_CPU_REGS, regs, nr_regs*sizeof(regs[0]));
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if (ret < 0)
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return ret;
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show_regs(regs, nr_regs);
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evntsel[1-1] = (regs[0].value >> (31-25)) & 0x7F;
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evntsel[2-1] = (regs[0].value >> (31-31)) & 0x3F;
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evntsel[3-1] = (regs[1].value >> (31- 4)) & 0x1F;
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evntsel[4-1] = (regs[1].value >> (31- 9)) & 0x1F;
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evntsel[5-1] = (regs[1].value >> (31-14)) & 0x1F;
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evntsel[6-1] = (regs[1].value >> (31-20)) & 0x3F;
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for(i = 0; i < nrctrs; ++i) {
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pmc = control->pmc_map[i];
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control->evntsel[i] = evntsel[pmc];
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if (i >= nractrs)
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control->ireset[i] = regs[3 + (i - nractrs)].value;
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}
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control->ppc.mmcr0 = regs[0].value & ~(MMCR0_PMC1SEL | MMCR0_PMC2SEL);
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control->ppc.mmcr2 = regs[2].value;
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return 0;
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}
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int _sys_vperfctr_write_control(int fd, unsigned int cpu_type, const struct vperfctr_control *control)
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{
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union {
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struct vperfctr_control_kernel control;
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struct perfctr_cpu_control_header header;
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} u;
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unsigned int nrctrs;
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int ret;
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ret = _sys_vperfctr_control(fd, VPERFCTR_CONTROL_CLEAR);
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if (ret < 0)
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return ret;
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u.control.si_signo = control->si_signo;
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u.control.preserve = control->preserve;
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ret = _sys_vperfctr_write(fd, VPERFCTR_DOMAIN_CONTROL,
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&u.control, sizeof u.control);
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if (ret < 0)
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return ret;
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u.header.tsc_on = control->cpu_control.tsc_on;
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u.header.nractrs = control->cpu_control.nractrs;
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u.header.nrictrs = control->cpu_control.nrictrs;
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ret = _sys_vperfctr_write(fd, PERFCTR_DOMAIN_CPU_CONTROL,
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&u.header, sizeof u.header);
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if (ret < 0)
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return ret;
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nrctrs = control->cpu_control.nractrs + control->cpu_control.nrictrs;
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ret = _sys_vperfctr_write(fd, PERFCTR_DOMAIN_CPU_MAP,
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&control->cpu_control.pmc_map,
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nrctrs * sizeof control->cpu_control.pmc_map[0]);
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if (ret < 0)
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Packit |
577717 |
return ret;
|
|
Packit |
577717 |
|
|
Packit |
577717 |
ret = write_cpu_regs(fd, &control->cpu_control);
|
|
Packit |
577717 |
if (ret < 0)
|
|
Packit |
577717 |
return ret;
|
|
Packit |
577717 |
|
|
Packit |
577717 |
return _sys_vperfctr_control(fd, VPERFCTR_CONTROL_RESUME);
|
|
Packit |
577717 |
}
|
|
Packit |
577717 |
|
|
Packit |
577717 |
int _sys_vperfctr_read_control(int fd, unsigned int cpu_type, struct vperfctr_control *control)
|
|
Packit |
577717 |
{
|
|
Packit |
577717 |
union {
|
|
Packit |
577717 |
struct vperfctr_control_kernel control;
|
|
Packit |
577717 |
struct perfctr_cpu_control_header header;
|
|
Packit |
577717 |
} u;
|
|
Packit |
577717 |
unsigned int nrctrs;
|
|
Packit |
577717 |
int ret;
|
|
Packit |
577717 |
|
|
Packit |
577717 |
memset(control, 0, sizeof *control);
|
|
Packit |
577717 |
|
|
Packit |
577717 |
ret = read_packet(fd, VPERFCTR_DOMAIN_CONTROL,
|
|
Packit |
577717 |
&u.control, sizeof u.control);
|
|
Packit |
577717 |
if (ret < 0)
|
|
Packit |
577717 |
return ret;
|
|
Packit |
577717 |
control->si_signo = u.control.si_signo;
|
|
Packit |
577717 |
control->preserve = u.control.preserve;
|
|
Packit |
577717 |
|
|
Packit |
577717 |
ret = read_packet(fd, PERFCTR_DOMAIN_CPU_CONTROL,
|
|
Packit |
577717 |
&u.header, sizeof u.header);
|
|
Packit |
577717 |
if (ret < 0)
|
|
Packit |
577717 |
return ret;
|
|
Packit |
577717 |
control->cpu_control.tsc_on = u.header.tsc_on;
|
|
Packit |
577717 |
control->cpu_control.nractrs = u.header.nractrs;
|
|
Packit |
577717 |
control->cpu_control.nrictrs = u.header.nrictrs;
|
|
Packit |
577717 |
|
|
Packit |
577717 |
nrctrs = control->cpu_control.nractrs + control->cpu_control.nrictrs;
|
|
Packit |
577717 |
ret = read_packet(fd, PERFCTR_DOMAIN_CPU_MAP,
|
|
Packit |
577717 |
&control->cpu_control.pmc_map,
|
|
Packit |
577717 |
nrctrs * sizeof control->cpu_control.pmc_map[0]);
|
|
Packit |
577717 |
if (ret < 0)
|
|
Packit |
577717 |
return ret;
|
|
Packit |
577717 |
|
|
Packit |
577717 |
return read_cpu_regs(fd, &control->cpu_control);
|
|
Packit |
577717 |
}
|
|
Packit |
577717 |
|
|
Packit |
577717 |
void perfctr_info_cpu_init(struct perfctr_info *info)
|
|
Packit |
577717 |
{
|
|
Packit |
577717 |
unsigned int pvr = mfspr(SPRN_PVR); /* trapped & emulated by the kernel */
|
|
Packit |
577717 |
unsigned int cpu_type;
|
|
Packit |
577717 |
|
|
Packit |
577717 |
switch( PVR_VER(pvr) ) {
|
|
Packit |
577717 |
case 0x0004: /* 604 */
|
|
Packit |
577717 |
cpu_type = PERFCTR_PPC_604;
|
|
Packit |
577717 |
break;
|
|
Packit |
577717 |
case 0x0009: /* 604e */
|
|
Packit |
577717 |
case 0x000A: /* 604ev */
|
|
Packit |
577717 |
cpu_type = PERFCTR_PPC_604e;
|
|
Packit |
577717 |
break;
|
|
Packit |
577717 |
case 0x0008: /* 750/740 */
|
|
Packit |
577717 |
case 0x7000: case 0x7001: /* 750FX */
|
|
Packit |
577717 |
case 0x7002: /* 750GX */
|
|
Packit |
577717 |
cpu_type = PERFCTR_PPC_750;
|
|
Packit |
577717 |
break;
|
|
Packit |
577717 |
case 0x000C: /* 7400 */
|
|
Packit |
577717 |
case 0x800C: /* 7410 */
|
|
Packit |
577717 |
cpu_type = PERFCTR_PPC_7400;
|
|
Packit |
577717 |
break;
|
|
Packit |
577717 |
case 0x8000: /* 7451/7441 */
|
|
Packit |
577717 |
case 0x8001: /* 7455/7445 */
|
|
Packit |
577717 |
case 0x8002: /* 7457/7447 */
|
|
Packit |
577717 |
case 0x8003: /* 7447A */
|
|
Packit |
577717 |
case 0x8004: /* 7448 */
|
|
Packit |
577717 |
cpu_type = PERFCTR_PPC_7450;
|
|
Packit |
577717 |
break;
|
|
Packit |
577717 |
default:
|
|
Packit |
577717 |
cpu_type = PERFCTR_PPC_GENERIC;
|
|
Packit |
577717 |
}
|
|
Packit |
577717 |
info->cpu_type = cpu_type;
|
|
Packit |
577717 |
}
|
|
Packit |
577717 |
|
|
Packit |
577717 |
unsigned int perfctr_info_nrctrs(const struct perfctr_info *info)
|
|
Packit |
577717 |
{
|
|
Packit |
577717 |
switch( info->cpu_type ) {
|
|
Packit |
577717 |
case PERFCTR_PPC_604:
|
|
Packit |
577717 |
return 2;
|
|
Packit |
577717 |
case PERFCTR_PPC_604e:
|
|
Packit |
577717 |
case PERFCTR_PPC_750:
|
|
Packit |
577717 |
case PERFCTR_PPC_7400:
|
|
Packit |
577717 |
return 4;
|
|
Packit |
577717 |
case PERFCTR_PPC_7450:
|
|
Packit |
577717 |
return 6;
|
|
Packit |
577717 |
default:
|
|
Packit |
577717 |
return 0;
|
|
Packit |
577717 |
}
|
|
Packit |
577717 |
}
|
|
Packit |
577717 |
|
|
Packit |
577717 |
const char *perfctr_info_cpu_name(const struct perfctr_info *info)
|
|
Packit |
577717 |
{
|
|
Packit |
577717 |
switch( info->cpu_type ) {
|
|
Packit |
577717 |
case PERFCTR_PPC_GENERIC:
|
|
Packit |
577717 |
return "Generic PowerPC with TB";
|
|
Packit |
577717 |
case PERFCTR_PPC_604:
|
|
Packit |
577717 |
return "PowerPC 604";
|
|
Packit |
577717 |
case PERFCTR_PPC_604e:
|
|
Packit |
577717 |
return "PowerPC 604e";
|
|
Packit |
577717 |
case PERFCTR_PPC_750:
|
|
Packit |
577717 |
return "PowerPC 750";
|
|
Packit |
577717 |
case PERFCTR_PPC_7400:
|
|
Packit |
577717 |
return "PowerPC 7400";
|
|
Packit |
577717 |
case PERFCTR_PPC_7450:
|
|
Packit |
577717 |
return "PowerPC 7450";
|
|
Packit |
577717 |
default:
|
|
Packit |
577717 |
return "?";
|
|
Packit |
577717 |
}
|
|
Packit |
577717 |
}
|
|
Packit |
577717 |
|
|
Packit |
577717 |
void perfctr_cpu_control_print(const struct perfctr_cpu_control *control)
|
|
Packit |
577717 |
{
|
|
Packit |
577717 |
unsigned int i, nractrs, nrictrs, nrctrs;
|
|
Packit |
577717 |
|
|
Packit |
577717 |
nractrs = control->nractrs;
|
|
Packit |
577717 |
nrictrs = control->nrictrs;
|
|
Packit |
577717 |
nrctrs = control->nractrs + nrictrs;
|
|
Packit |
577717 |
|
|
Packit |
577717 |
printf("tsc_on\t\t\t%u\n", control->tsc_on);
|
|
Packit |
577717 |
printf("nractrs\t\t\t%u\n", nractrs);
|
|
Packit |
577717 |
if( nrictrs )
|
|
Packit |
577717 |
printf("nrictrs\t\t\t%u\n", nrictrs);
|
|
Packit |
577717 |
for(i = 0; i < nrctrs; ++i) {
|
|
Packit |
577717 |
printf("pmc_map[%u]\t\t%u\n", i, control->pmc_map[i]);
|
|
Packit |
577717 |
printf("evntsel[%u]\t\t0x%08X\n", i, control->evntsel[i]);
|
|
Packit |
577717 |
if( i >= nractrs )
|
|
Packit |
577717 |
printf("ireset[%u]\t\t%d\n", i, control->ireset[i]);
|
|
Packit |
577717 |
}
|
|
Packit |
577717 |
if( control->ppc.mmcr0 )
|
|
Packit |
577717 |
printf("mmcr0\t\t\t0x%08X\n", control->ppc.mmcr0);
|
|
Packit |
577717 |
if( control->ppc.mmcr2 )
|
|
Packit |
577717 |
printf("mmcr2\t\t\t0x%08X\n", control->ppc.mmcr2);
|
|
Packit |
577717 |
}
|