diff options
Diffstat (limited to 'sys/powerpc/aim/mp_cpudep.c')
| -rw-r--r-- | sys/powerpc/aim/mp_cpudep.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/sys/powerpc/aim/mp_cpudep.c b/sys/powerpc/aim/mp_cpudep.c new file mode 100644 index 000000000000..5b867dd6ab3b --- /dev/null +++ b/sys/powerpc/aim/mp_cpudep.c @@ -0,0 +1,231 @@ +/*- + * Copyright (c) 2008 Marcel Moolenaar + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/bus.h> +#include <sys/pcpu.h> +#include <sys/proc.h> +#include <sys/smp.h> + +#include <machine/bat.h> +#include <machine/bus.h> +#include <machine/cpu.h> +#include <machine/hid.h> +#include <machine/intr_machdep.h> +#include <machine/pcb.h> +#include <machine/psl.h> +#include <machine/smp.h> +#include <machine/spr.h> +#include <machine/trap_aim.h> + +#include <dev/ofw/openfirm.h> +#include <machine/ofw_machdep.h> + +extern void *rstcode; + +void *ap_pcpu; + +static int +powerpc_smp_fill_cpuref(struct cpuref *cpuref, phandle_t cpu) +{ + int cpuid, res; + + cpuref->cr_hwref = cpu; + res = OF_getprop(cpu, "reg", &cpuid, sizeof(cpuid)); + if (res < 0) + return (ENOENT); + + cpuref->cr_cpuid = cpuid & 0xff; + return (0); +} + +int +powerpc_smp_first_cpu(struct cpuref *cpuref) +{ + char buf[8]; + phandle_t cpu, dev, root; + int res; + + root = OF_peer(0); + + dev = OF_child(root); + while (dev != 0) { + res = OF_getprop(dev, "name", buf, sizeof(buf)); + if (res > 0 && strcmp(buf, "cpus") == 0) + break; + dev = OF_peer(dev); + } + if (dev == 0) + return (ENOENT); + + cpu = OF_child(dev); + while (cpu != 0) { + res = OF_getprop(cpu, "device_type", buf, sizeof(buf)); + if (res > 0 && strcmp(buf, "cpu") == 0) + break; + cpu = OF_peer(cpu); + } + if (cpu == 0) + return (ENOENT); + + return (powerpc_smp_fill_cpuref(cpuref, cpu)); +} + +int +powerpc_smp_next_cpu(struct cpuref *cpuref) +{ + char buf[8]; + phandle_t cpu; + int res; + + cpu = OF_peer(cpuref->cr_hwref); + while (cpu != 0) { + res = OF_getprop(cpu, "device_type", buf, sizeof(buf)); + if (res > 0 && strcmp(buf, "cpu") == 0) + break; + cpu = OF_peer(cpu); + } + if (cpu == 0) + return (ENOENT); + + return (powerpc_smp_fill_cpuref(cpuref, cpu)); +} + +int +powerpc_smp_get_bsp(struct cpuref *cpuref) +{ + ihandle_t inst; + phandle_t bsp, chosen; + int res; + + chosen = OF_finddevice("/chosen"); + if (chosen == 0) + return (ENXIO); + + res = OF_getprop(chosen, "cpu", &inst, sizeof(inst)); + if (res < 0) + return (ENXIO); + + bsp = OF_instance_to_package(inst); + return (powerpc_smp_fill_cpuref(cpuref, bsp)); +} + +uint32_t +cpudep_ap_bootstrap(volatile uint32_t *trcp) +{ + uint32_t hid, msr, sp; + + trcp[0] = 0x2000; + trcp[1] = (uint32_t)&cpudep_ap_bootstrap; + + __asm __volatile("mtsprg 0, %0" :: "r"(ap_pcpu)); + __asm __volatile("sync"); + + trcp[0] = 0x2001; + trcp[1] = (uint32_t)pcpup; + + hid = mfspr(SPR_HID0); + hid &= ~(HID0_ICE | HID0_DCE); + hid &= ~(HID0_DOZE | HID0_NAP | HID0_SLEEP); + mtspr(SPR_HID0, hid); + isync(); + + trcp[0] = 0x2002; + trcp[1] = hid; + + hid |= HID0_ICFI | HID0_DCFI; + hid |= HID0_ICE | HID0_DCE; + mtspr(SPR_HID0, hid); + isync(); + + trcp[0] = 0x2003; + trcp[1] = hid; + + msr = PSL_IR | PSL_DR | PSL_ME; + mtmsr(msr); + isync(); + + trcp[0] = 0x2004; + trcp[1] = msr; + + hid |= HID0_NAP | HID0_DPM; + mtspr(SPR_HID0, hid); + isync(); + + trcp[0] = 0x2005; + trcp[1] = hid; + + pcpup->pc_curthread = pcpup->pc_idlethread; + pcpup->pc_curpcb = pcpup->pc_curthread->td_pcb; + sp = pcpup->pc_curpcb->pcb_sp; + + trcp[0] = 0x2006; + trcp[1] = sp; + + return (sp); +} + +int +powerpc_smp_start_cpu(struct pcpu *pc) +{ + phandle_t cpu; + volatile uint32_t *trcp; + volatile uint8_t *rstvec; + uint32_t trace; + int res, reset, timeout; + + cpu = pc->pc_hwref; + res = OF_getprop(cpu, "soft-reset", &reset, sizeof(reset)); + if (res < 0) + return (ENXIO); + + trcp = (uint32_t *)(EXC_RST + 4); + trace = *trcp; + + ap_pcpu = pc; + + rstvec = (uint8_t *)(0x80000000 + reset); + + *rstvec = 4; + __asm __volatile("sync"); + DELAY(1); + *rstvec = 0; + __asm __volatile("sync"); + + timeout = 1000; + while (!pc->pc_awake && timeout--) + DELAY(100); + + if (!pc->pc_awake) + printf("XXX: timeout (trace=%x; data=%x)\n", trcp[0], trcp[1]); + + return (0); +} |