From: Michal Simek <monstr@xxxxxxxxx> Signed-off-by: Michal Simek <monstr@xxxxxxxxx> --- arch/microblaze/kernel/cpu/mb.c | 115 ++++++++++++++++++++++++++++++++++++++ arch/microblaze/kernel/cpu/pvr.c | 83 +++++++++++++++++++++++++++ 2 files changed, 198 insertions(+), 0 deletions(-) create mode 100644 arch/microblaze/kernel/cpu/mb.c create mode 100644 arch/microblaze/kernel/cpu/pvr.c diff --git a/arch/microblaze/kernel/cpu/mb.c b/arch/microblaze/kernel/cpu/mb.c new file mode 100644 index 0000000..44a911c --- /dev/null +++ b/arch/microblaze/kernel/cpu/mb.c @@ -0,0 +1,115 @@ +/* + * arch/microblaze/kernel/cpu/mb.c + * + * CPU-version specific code + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2007 Michal Simek <monstr@xxxxxxxxx> + * Copyright (C) 2006 PetaLogix + */ + +#include <linux/init.h> +#include <linux/string.h> +#include <linux/seq_file.h> +#include <linux/cpu.h> +#include <linux/initrd.h> + +#include <asm/cpuinfo.h> +#include <asm/setup.h> +#include <asm/sections.h> +#include <asm/page.h> +#include <asm/io.h> +#include <asm/bug.h> +#include <asm/param.h> + +static int show_cpuinfo(struct seq_file *m, void *v) +{ + int count = 0; + char *fpga_family = "Unknown"; + char *cpu_ver = "Unknown"; + int i; + + /* Denormalised to get the fpga family string */ + for (i = 0; family_string_lookup[i].s != NULL; i++) { + if (cpuinfo.fpga_family_code == family_string_lookup[i].k) { + fpga_family = (char *)family_string_lookup[i].s; + break; + } + } + + /* Denormalised to get the hw version string */ + for (i = 0; cpu_ver_lookup[i].s != NULL; i++) { + if (cpuinfo.ver_code == cpu_ver_lookup[i].k) { + cpu_ver = (char *)cpu_ver_lookup[i].s; + break; + } + } + + count = seq_printf(m, + "CPU-Family: MicroBlaze\n" + "FPGA-Arch: %s\n" + "CPU-Ver: %s\n" + "CPU-MHz: %d.%02d\n" + "BogoMips: %lu.%02lu\n", + fpga_family, + cpu_ver, + cpuinfo.cpu_clock_freq / + 1000000, + cpuinfo.cpu_clock_freq % + 1000000, + loops_per_jiffy / (500000 / HZ), + (loops_per_jiffy / (5000 / HZ)) % 100); + + count += seq_printf(m, + "HW-Div:\t\t%s\n" + "HW-Shift:\t%s\n", + cpuinfo.use_divider ? "yes" : "no", + cpuinfo.use_barrel ? "yes" : "no"); + + if (cpuinfo.use_icache) + count += seq_printf(m, + "Icache:\t\t%ukB\n", + cpuinfo.icache_size >> 10); + else + count += seq_printf(m, "Icache:\t\tno\n"); + + if (cpuinfo.use_dcache) + count += seq_printf(m, + "Dcache:\t\t%ukB\n", + cpuinfo.dcache_size >> 10); + else + count += seq_printf(m, "Dcache:\t\tno\n"); + + count += seq_printf(m, + "HW-Debug:\t%s\n", + cpuinfo.hw_debug ? "yes" : "no"); + + return 0; +} + +static void *c_start(struct seq_file *m, loff_t *pos) +{ + int i = *pos; + + return i < NR_CPUS ? (void *) (i + 1) : NULL; +} + +static void *c_next(struct seq_file *m, void *v, loff_t *pos) +{ + ++*pos; + return c_start(m, pos); +} + +static void c_stop(struct seq_file *m, void *v) +{ +} + +struct seq_operations cpuinfo_op = { + .start = c_start, + .next = c_next, + .stop = c_stop, + .show = show_cpuinfo, +}; diff --git a/arch/microblaze/kernel/cpu/pvr.c b/arch/microblaze/kernel/cpu/pvr.c new file mode 100644 index 0000000..19d99a8 --- /dev/null +++ b/arch/microblaze/kernel/cpu/pvr.c @@ -0,0 +1,83 @@ +/* + * arch/microblaze/kernel/cpu/pvr.c + * + * Support for MicroBlaze PVR (processor version register) + * + * Copyright (C) 2007 Michal Simek <monstr@xxxxxxxxx> + * Copyright (C) 2007 John Williams <john.williams@xxxxxxxxxxxxx> + * Copyright (C) 2007 PetaLogix + */ + +#include <linux/kernel.h> +#include <linux/compiler.h> +#include <asm/system.h> +#include <asm/exceptions.h> +#include <asm/pvr.h> + +/* + * Until we get an assembler that knows about the pvr registers, + * this horrible cruft will have to do. + * That hardcoded opcode is mfs r3, rpvrNN + */ + +#define get_single_pvr(pvrid, val) \ +{ \ + register unsigned tmp __asm__("r3"); \ + tmp = 0x0; /* Prevent warning about unused */ \ + __asm__ __volatile__ ( \ + ".byte 0x94,0x60,0xa0, " #pvrid "\n\t" \ + : "=r" (tmp):: "memory"); \ + val = tmp; \ +} + +/* + * Does the CPU support the PVR register? + * return value: + * 0: no PVR + * 1: simple PVR + * 2: full PVR + * + * This must work on all CPU versions, including those before the + * PVR was even an option. + */ + +int cpu_has_pvr(void) +{ + unsigned flags; + unsigned pvr0; + int ret = 0; + + local_irq_save(flags); + + /* PVR bit in MSR tells us if there is any support */ + if (!(flags & PVR_MSR_BIT)) + goto out; + + get_single_pvr(0x00, pvr0); + pr_debug("%s: pvr0 is 0x%08x\n", __func__, pvr0); + + if (pvr0 & PVR0_PVR_FULL_MASK) + ret = 2; + else + ret = 1; + +out: + local_irq_restore(flags); + return ret; +} + +void get_pvr(struct pvr_s *p) +{ + get_single_pvr(0, p->pvr[0]); + get_single_pvr(1, p->pvr[1]); + get_single_pvr(2, p->pvr[2]); + get_single_pvr(3, p->pvr[3]); + get_single_pvr(4, p->pvr[4]); + get_single_pvr(5, p->pvr[5]); + get_single_pvr(6, p->pvr[6]); + get_single_pvr(7, p->pvr[7]); + get_single_pvr(8, p->pvr[8]); + get_single_pvr(9, p->pvr[9]); + get_single_pvr(10, p->pvr[10]); + get_single_pvr(11, p->pvr[11]); +} -- 1.5.4.GIT -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html