b40ce02a2f
new platform module. These are probed in early boot, and have the responsibility of determining the layout of physical memory, determining the CPU timebase frequency, and handling the zoo of SMP mechanisms found on PowerPC. Reviewed by: marcel, raj Book-E parts by: raj
186 lines
4.8 KiB
C
186 lines
4.8 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/bootinfo.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 <powerpc/mpc85xx/mpc85xx.h>
|
|
#include <powerpc/mpc85xx/ocpbus.h>
|
|
|
|
#include "platform_if.h"
|
|
|
|
static int cpu;
|
|
|
|
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 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),
|
|
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static platform_def_t bare_platform = {
|
|
"bare metal",
|
|
bare_methods,
|
|
0
|
|
};
|
|
|
|
PLATFORM_DEF(bare_platform);
|
|
|
|
static int
|
|
bare_probe(platform_t plat)
|
|
{
|
|
|
|
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)
|
|
{
|
|
struct bi_mem_region *mr;
|
|
int i;
|
|
|
|
/* Initialize memory regions table */
|
|
mr = bootinfo_mr();
|
|
for (i = 0; i < bootinfo->bi_mem_reg_no; i++, mr++) {
|
|
if (i == MEM_REGIONS)
|
|
break;
|
|
if (mr->mem_base < 1048576) {
|
|
avail_regions[i].mr_start = 1048576;
|
|
avail_regions[i].mr_size = mr->mem_size -
|
|
(1048576 - mr->mem_base);
|
|
} else {
|
|
avail_regions[i].mr_start = mr->mem_base;
|
|
avail_regions[i].mr_size = mr->mem_size;
|
|
}
|
|
}
|
|
*availsz = i;
|
|
*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 = -1;
|
|
|
|
/*
|
|
* Time Base and Decrementer are updated every 8 CCB bus clocks.
|
|
* HID0[SEL_TBCLK] = 0
|
|
*/
|
|
ticks = bootinfo->bi_bus_clk / 8;
|
|
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)
|
|
{
|
|
|
|
/* No SMP support */
|
|
return (ENXIO);
|
|
}
|