/*- * Copyright (c) 2008-2009 Semihalf, Rafal Jaworowski * 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 __FBSDID("$FreeBSD: head/sys/powerpc/booke/platform_bare.c 217523 2011-01-17 23:54:50Z marcel $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "platform_if.h" #ifdef SMP extern void *ap_pcpu; extern uint8_t __boot_page[]; /* Boot page body */ extern uint32_t kernload; /* Kernel physical load address */ #endif extern uint32_t *bootinfo; static int cpu, maxcpu; static int bare_probe(platform_t); static void bare_mem_regions(platform_t, struct mem_region **phys, int *physsz, struct mem_region **avail, int *availsz); static u_long bare_timebase_freq(platform_t, struct cpuref *cpuref); static int bare_smp_first_cpu(platform_t, struct cpuref *cpuref); static int bare_smp_next_cpu(platform_t, struct cpuref *cpuref); static int bare_smp_get_bsp(platform_t, struct cpuref *cpuref); static int bare_smp_start_cpu(platform_t, struct pcpu *cpu); static void e500_reset(platform_t); static platform_method_t bare_methods[] = { PLATFORMMETHOD(platform_probe, bare_probe), PLATFORMMETHOD(platform_mem_regions, bare_mem_regions), PLATFORMMETHOD(platform_timebase_freq, bare_timebase_freq), PLATFORMMETHOD(platform_smp_first_cpu, bare_smp_first_cpu), PLATFORMMETHOD(platform_smp_next_cpu, bare_smp_next_cpu), PLATFORMMETHOD(platform_smp_get_bsp, bare_smp_get_bsp), PLATFORMMETHOD(platform_smp_start_cpu, bare_smp_start_cpu), PLATFORMMETHOD(platform_reset, e500_reset), { 0, 0 } }; static platform_def_t bare_platform = { "bare metal", bare_methods, 0 }; PLATFORM_DEF(bare_platform); static int bare_probe(platform_t plat) { uint32_t ver, sr; int i, law_max, tgt; ver = SVR_VER(mfspr(SPR_SVR)); if (ver == SVR_MPC8572E || ver == SVR_MPC8572) maxcpu = 2; else maxcpu = 1; /* * Clear local access windows. Skip DRAM entries, so we don't shoot * ourselves in the foot. */ law_max = law_getmax(); for (i = 0; i < law_max; i++) { sr = ccsr_read4(OCP85XX_LAWSR(i)); if ((sr & 0x80000000) == 0) continue; tgt = (sr & 0x01f00000) >> 20; if (tgt == OCP85XX_TGTIF_RAM1 || tgt == OCP85XX_TGTIF_RAM2 || tgt == OCP85XX_TGTIF_RAM_INTL) continue; ccsr_write4(OCP85XX_LAWSR(i), sr & 0x7fffffff); } return (BUS_PROBE_GENERIC); } #define MEM_REGIONS 8 static struct mem_region avail_regions[MEM_REGIONS]; void bare_mem_regions(platform_t plat, struct mem_region **phys, int *physsz, struct mem_region **avail, int *availsz) { uint32_t memsize; int i, rv; rv = fdt_get_mem_regions(avail_regions, availsz, &memsize); if (rv != 0) return; for (i = 0; i < *availsz; i++) { if (avail_regions[i].mr_start < 1048576) { avail_regions[i].mr_size = avail_regions[i].mr_size - (1048576 - avail_regions[i].mr_start); avail_regions[i].mr_start = 1048576; } } *avail = avail_regions; /* On the bare metal platform phys == avail memory */ *physsz = *availsz; *phys = *avail; } static u_long bare_timebase_freq(platform_t plat, struct cpuref *cpuref) { u_long ticks; phandle_t cpus, child; pcell_t freq; /* Backward compatibility. See 8-STABLE. */ ticks = bootinfo[3] >> 3; if ((cpus = OF_finddevice("/cpus")) == 0) goto out; if ((child = OF_child(cpus)) == 0) goto out; freq = 0; if (OF_getprop(child, "bus-frequency", (void *)&freq, sizeof(freq)) <= 0) goto out; /* * Time Base and Decrementer are updated every 8 CCB bus clocks. * HID0[SEL_TBCLK] = 0 */ if (freq != 0) ticks = freq / 8; out: if (ticks <= 0) panic("Unable to determine timebase frequency!"); return (ticks); } static int bare_smp_first_cpu(platform_t plat, struct cpuref *cpuref) { cpu = 0; cpuref->cr_cpuid = cpu; cpuref->cr_hwref = cpuref->cr_cpuid; if (bootverbose) printf("powerpc_smp_first_cpu: cpuid %d\n", cpuref->cr_cpuid); cpu++; return (0); } static int bare_smp_next_cpu(platform_t plat, struct cpuref *cpuref) { if (cpu >= maxcpu) return (ENOENT); cpuref->cr_cpuid = cpu++; cpuref->cr_hwref = cpuref->cr_cpuid; if (bootverbose) printf("powerpc_smp_next_cpu: cpuid %d\n", cpuref->cr_cpuid); return (0); } static int bare_smp_get_bsp(platform_t plat, struct cpuref *cpuref) { cpuref->cr_cpuid = mfspr(SPR_PIR); cpuref->cr_hwref = cpuref->cr_cpuid; return (0); } static int bare_smp_start_cpu(platform_t plat, struct pcpu *pc) { #ifdef SMP uint32_t bptr, eebpcr; int timeout; eebpcr = ccsr_read4(OCP85XX_EEBPCR); if ((eebpcr & (pc->pc_cpumask << 24)) != 0) { printf("%s: CPU=%d already out of hold-off state!\n", __func__, pc->pc_cpuid); return (ENXIO); } ap_pcpu = pc; __asm __volatile("msync; isync"); /* * Set BPTR to the physical address of the boot page */ bptr = ((uint32_t)__boot_page - KERNBASE) + kernload; ccsr_write4(OCP85XX_BPTR, (bptr >> 12) | 0x80000000); /* * Release AP from hold-off state */ eebpcr |= (pc->pc_cpumask << 24); ccsr_write4(OCP85XX_EEBPCR, eebpcr); __asm __volatile("isync; msync"); timeout = 500; while (!pc->pc_awake && timeout--) DELAY(1000); /* wait 1ms */ return ((pc->pc_awake) ? 0 : EBUSY); #else /* No SMP support */ return (ENXIO); #endif } static void e500_reset(platform_t plat) { uint32_t ver = SVR_VER(mfspr(SPR_SVR)); if (ver == SVR_MPC8572E || ver == SVR_MPC8572 || ver == SVR_MPC8548E || ver == SVR_MPC8548) /* Systems with dedicated reset register */ ccsr_write4(OCP85XX_RSTCR, 2); else { /* Clear DBCR0, disables debug interrupts and events. */ mtspr(SPR_DBCR0, 0); __asm __volatile("isync"); /* Enable Debug Interrupts in MSR. */ mtmsr(mfmsr() | PSL_DE); /* Enable debug interrupts and issue reset. */ mtspr(SPR_DBCR0, mfspr(SPR_DBCR0) | DBCR0_IDM | DBCR0_RST_SYSTEM); } printf("Reset failed...\n"); while (1); }