microblaze_v8: PVR support, cpuinfo support
Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Michal Simek
148
arch/microblaze/kernel/cpu/mb.c
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148
arch/microblaze/kernel/cpu/mb.c
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/*
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* CPU-version specific code
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*
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* Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2006-2009 PetaLogix
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/init.h>
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#include <linux/string.h>
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#include <linux/seq_file.h>
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#include <linux/cpu.h>
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#include <linux/initrd.h>
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#include <linux/bug.h>
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#include <asm/cpuinfo.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <asm/page.h>
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#include <linux/param.h>
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#include <asm/pvr.h>
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#include <asm/sections.h>
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#include <asm/setup.h>
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static int show_cpuinfo(struct seq_file *m, void *v)
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{
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int count = 0;
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char *fpga_family = "Unknown";
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char *cpu_ver = "Unknown";
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int i;
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/* Denormalised to get the fpga family string */
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for (i = 0; family_string_lookup[i].s != NULL; i++) {
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if (cpuinfo.fpga_family_code == family_string_lookup[i].k) {
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fpga_family = (char *)family_string_lookup[i].s;
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break;
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}
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}
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/* Denormalised to get the hw version string */
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for (i = 0; cpu_ver_lookup[i].s != NULL; i++) {
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if (cpuinfo.ver_code == cpu_ver_lookup[i].k) {
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cpu_ver = (char *)cpu_ver_lookup[i].s;
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break;
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}
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}
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count = seq_printf(m,
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"CPU-Family: MicroBlaze\n"
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"FPGA-Arch: %s\n"
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"CPU-Ver: %s\n"
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"CPU-MHz: %d.%02d\n"
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"BogoMips: %lu.%02lu\n",
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fpga_family,
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cpu_ver,
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cpuinfo.cpu_clock_freq /
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1000000,
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cpuinfo.cpu_clock_freq %
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1000000,
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loops_per_jiffy / (500000 / HZ),
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(loops_per_jiffy / (5000 / HZ)) % 100);
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count += seq_printf(m,
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"HW:\n Shift:\t\t%s\n"
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" MSR:\t\t%s\n"
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" PCMP:\t\t%s\n"
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" DIV:\t\t%s\n",
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(cpuinfo.use_instr & PVR0_USE_BARREL_MASK) ? "yes" : "no",
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(cpuinfo.use_instr & PVR2_USE_MSR_INSTR) ? "yes" : "no",
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(cpuinfo.use_instr & PVR2_USE_PCMP_INSTR) ? "yes" : "no",
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(cpuinfo.use_instr & PVR0_USE_DIV_MASK) ? "yes" : "no");
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count += seq_printf(m,
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" MMU:\t\t%x\n",
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cpuinfo.mmu);
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count += seq_printf(m,
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" MUL:\t\t%s\n"
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" FPU:\t\t%s\n",
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(cpuinfo.use_mult & PVR2_USE_MUL64_MASK) ? "v2" :
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(cpuinfo.use_mult & PVR0_USE_HW_MUL_MASK) ? "v1" : "no",
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(cpuinfo.use_fpu & PVR2_USE_FPU2_MASK) ? "v2" :
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(cpuinfo.use_fpu & PVR0_USE_FPU_MASK) ? "v1" : "no");
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count += seq_printf(m,
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" Exc:\t\t%s%s%s%s%s%s%s%s\n",
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(cpuinfo.use_exc & PVR2_OPCODE_0x0_ILL_MASK) ? "op0x0 " : "",
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(cpuinfo.use_exc & PVR2_UNALIGNED_EXC_MASK) ? "unal " : "",
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(cpuinfo.use_exc & PVR2_ILL_OPCODE_EXC_MASK) ? "ill " : "",
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(cpuinfo.use_exc & PVR2_IOPB_BUS_EXC_MASK) ? "iopb " : "",
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(cpuinfo.use_exc & PVR2_DOPB_BUS_EXC_MASK) ? "dopb " : "",
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(cpuinfo.use_exc & PVR2_DIV_ZERO_EXC_MASK) ? "zero " : "",
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(cpuinfo.use_exc & PVR2_FPU_EXC_MASK) ? "fpu " : "",
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(cpuinfo.use_exc & PVR2_USE_FSL_EXC) ? "fsl " : "");
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if (cpuinfo.use_icache)
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count += seq_printf(m,
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"Icache:\t\t%ukB\n",
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cpuinfo.icache_size >> 10);
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else
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count += seq_printf(m, "Icache:\t\tno\n");
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if (cpuinfo.use_dcache)
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count += seq_printf(m,
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"Dcache:\t\t%ukB\n",
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cpuinfo.dcache_size >> 10);
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else
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count += seq_printf(m, "Dcache:\t\tno\n");
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count += seq_printf(m,
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"HW-Debug:\t%s\n",
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cpuinfo.hw_debug ? "yes" : "no");
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count += seq_printf(m,
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"PVR-USR1:\t%x\n"
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"PVR-USR2:\t%x\n",
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cpuinfo.pvr_user1,
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cpuinfo.pvr_user2);
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return 0;
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}
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static void *c_start(struct seq_file *m, loff_t *pos)
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{
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int i = *pos;
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return i < NR_CPUS ? (void *) (i + 1) : NULL;
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}
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static void *c_next(struct seq_file *m, void *v, loff_t *pos)
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{
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++*pos;
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return c_start(m, pos);
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}
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static void c_stop(struct seq_file *m, void *v)
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{
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}
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const struct seq_operations cpuinfo_op = {
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.start = c_start,
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.next = c_next,
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.stop = c_stop,
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.show = show_cpuinfo,
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};
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81
arch/microblaze/kernel/cpu/pvr.c
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81
arch/microblaze/kernel/cpu/pvr.c
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@@ -0,0 +1,81 @@
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/*
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* Support for MicroBlaze PVR (processor version register)
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*
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* Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2007-2009 PetaLogix
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* Copyright (C) 2007 John Williams <john.williams@petalogix.com>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/compiler.h>
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#include <asm/system.h>
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#include <asm/exceptions.h>
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#include <asm/pvr.h>
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/*
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* Until we get an assembler that knows about the pvr registers,
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* this horrible cruft will have to do.
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* That hardcoded opcode is mfs r3, rpvrNN
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*/
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#define get_single_pvr(pvrid, val) \
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{ \
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register unsigned tmp __asm__("r3"); \
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tmp = 0x0; /* Prevent warning about unused */ \
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__asm__ __volatile__ ( \
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".byte 0x94,0x60,0xa0, " #pvrid "\n\t" \
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: "=r" (tmp) : : "memory"); \
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val = tmp; \
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}
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/*
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* Does the CPU support the PVR register?
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* return value:
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* 0: no PVR
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* 1: simple PVR
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* 2: full PVR
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*
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* This must work on all CPU versions, including those before the
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* PVR was even an option.
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*/
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int cpu_has_pvr(void)
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{
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unsigned flags;
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unsigned pvr0;
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local_save_flags(flags);
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/* PVR bit in MSR tells us if there is any support */
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if (!(flags & PVR_MSR_BIT))
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return 0;
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get_single_pvr(0x00, pvr0);
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pr_debug("%s: pvr0 is 0x%08x\n", __func__, pvr0);
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if (pvr0 & PVR0_PVR_FULL_MASK)
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return 1;
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/* for partial PVR use static cpuinfo */
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return 2;
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}
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void get_pvr(struct pvr_s *p)
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{
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get_single_pvr(0, p->pvr[0]);
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get_single_pvr(1, p->pvr[1]);
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get_single_pvr(2, p->pvr[2]);
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get_single_pvr(3, p->pvr[3]);
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get_single_pvr(4, p->pvr[4]);
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get_single_pvr(5, p->pvr[5]);
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get_single_pvr(6, p->pvr[6]);
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get_single_pvr(7, p->pvr[7]);
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get_single_pvr(8, p->pvr[8]);
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get_single_pvr(9, p->pvr[9]);
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get_single_pvr(10, p->pvr[10]);
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get_single_pvr(11, p->pvr[11]);
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}
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