e3d4100642
1. Allow embedding the FDT into the kernel, just like PowerPC/book-E.
2. If the loader passes us a pointer to the bootinfo structure, save
it and use it to fill in the gaps (e.g. bus frequencies, etc).
303 lines
7.3 KiB
C
303 lines
7.3 KiB
C
/*-
|
|
* 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 <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/bus.h>
|
|
#include <machine/cpu.h>
|
|
#include <machine/hid.h>
|
|
#include <machine/platform.h>
|
|
#include <machine/platformvar.h>
|
|
#include <machine/smp.h>
|
|
#include <machine/spr.h>
|
|
#include <machine/vmparam.h>
|
|
|
|
#include <dev/fdt/fdt_common.h>
|
|
#include <dev/ofw/ofw_bus.h>
|
|
#include <dev/ofw/ofw_bus_subr.h>
|
|
#include <dev/ofw/openfirm.h>
|
|
|
|
#include <powerpc/mpc85xx/mpc85xx.h>
|
|
|
|
#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);
|
|
}
|
|
|