/*- * Copyright (c) 2009 Neelkanth Natu * 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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("$FreeBSD$"); #include #include #include #include #include #include #include #include #include "sb_scd.h" /* * We compile a 32-bit kernel to run on the SB-1 processor which is a 64-bit * processor. It has some registers that must be accessed using 64-bit load * and store instructions. * * We use the mips_ld() and mips_sd() functions to do this for us. */ #define sb_store64(addr, val) mips3_sd((uint64_t *)(uintptr_t)(addr), (val)) #define sb_load64(addr) mips3_ld((uint64_t *)(uintptr_t)(addr)) /* * System Control and Debug (SCD) unit on the Sibyte ZBbus. */ /* * Extract the value starting at bit position 'b' for 'n' bits from 'x'. */ #define GET_VAL_64(x, b, n) (((x) >> (b)) & ((1ULL << (n)) - 1)) #define SYSREV_ADDR MIPS_PHYS_TO_KSEG1(0x10020000) #define SYSREV_NUM_PROCESSORS(x) GET_VAL_64((x), 24, 4) #define SYSCFG_ADDR MIPS_PHYS_TO_KSEG1(0x10020008) #define SYSCFG_PLLDIV(x) GET_VAL_64((x), 7, 5) #define ZBBUS_CYCLE_COUNT_ADDR MIPS_PHYS_TO_KSEG1(0x10030000) #define INTSRC_MASK_ADDR(cpu) \ (MIPS_PHYS_TO_KSEG1(0x10020028) | ((cpu) << 13)) #define INTSRC_MAP_ADDR(cpu, intsrc) \ (MIPS_PHYS_TO_KSEG1(0x10020200) | ((cpu) << 13)) + (intsrc * 8) #define MAILBOX_SET_ADDR(cpu) \ (MIPS_PHYS_TO_KSEG1(0x100200C8) | ((cpu) << 13)) #define MAILBOX_CLEAR_ADDR(cpu) \ (MIPS_PHYS_TO_KSEG1(0x100200D0) | ((cpu) << 13)) static uint64_t sb_read_syscfg(void) { return (sb_load64(SYSCFG_ADDR)); } static void sb_write_syscfg(uint64_t val) { sb_store64(SYSCFG_ADDR, val); } uint64_t sb_zbbus_cycle_count(void) { return (sb_load64(ZBBUS_CYCLE_COUNT_ADDR)); } uint64_t sb_cpu_speed(void) { int plldiv; const uint64_t MHZ = 1000000; plldiv = SYSCFG_PLLDIV(sb_read_syscfg()); if (plldiv == 0) { printf("PLL_DIV is 0 - assuming 6 (300MHz).\n"); plldiv = 6; } return (plldiv * 50 * MHZ); } void sb_system_reset(void) { uint64_t syscfg; const uint64_t SYSTEM_RESET = 1ULL << 60; const uint64_t EXT_RESET = 1ULL << 59; const uint64_t SOFT_RESET = 1ULL << 58; syscfg = sb_read_syscfg(); syscfg &= ~SOFT_RESET; syscfg |= SYSTEM_RESET | EXT_RESET; sb_write_syscfg(syscfg); } void sb_disable_intsrc(int cpu, int src) { int regaddr; uint64_t val; regaddr = INTSRC_MASK_ADDR(cpu); val = sb_load64(regaddr); val |= 1ULL << src; sb_store64(regaddr, val); } void sb_enable_intsrc(int cpu, int src) { int regaddr; uint64_t val; regaddr = INTSRC_MASK_ADDR(cpu); val = sb_load64(regaddr); val &= ~(1ULL << src); sb_store64(regaddr, val); } void sb_write_intsrc_mask(int cpu, uint64_t val) { int regaddr; regaddr = INTSRC_MASK_ADDR(cpu); sb_store64(regaddr, val); } uint64_t sb_read_intsrc_mask(int cpu) { int regaddr; uint64_t val; regaddr = INTSRC_MASK_ADDR(cpu); val = sb_load64(regaddr); return (val); } void sb_write_intmap(int cpu, int intsrc, int intrnum) { int regaddr; regaddr = INTSRC_MAP_ADDR(cpu, intsrc); sb_store64(regaddr, intrnum); } int sb_read_intmap(int cpu, int intsrc) { int regaddr; regaddr = INTSRC_MAP_ADDR(cpu, intsrc); return (sb_load64(regaddr) & 0x7); } int sb_route_intsrc(int intsrc) { int intrnum; KASSERT(intsrc >= 0 && intsrc < NUM_INTSRC, ("Invalid interrupt source number (%d)", intsrc)); /* * Interrupt 5 is used by sources internal to the CPU (e.g. timer). * Use a deterministic mapping for the remaining sources. */ #ifdef SMP KASSERT(platform_ipi_intrnum() == 4, ("Unexpected interrupt number used for IPI")); intrnum = intsrc % 4; #else intrnum = intsrc % 5; #endif return (intrnum); } #ifdef SMP static uint64_t sb_read_sysrev(void) { return (sb_load64(SYSREV_ADDR)); } void sb_set_mailbox(int cpu, uint64_t val) { int regaddr; regaddr = MAILBOX_SET_ADDR(cpu); sb_store64(regaddr, val); } void sb_clear_mailbox(int cpu, uint64_t val) { int regaddr; regaddr = MAILBOX_CLEAR_ADDR(cpu); sb_store64(regaddr, val); } void platform_cpu_mask(cpuset_t *mask) { int i, s; CPU_ZERO(mask); s = SYSREV_NUM_PROCESSORS(sb_read_sysrev()); for (i = 0; i < s; i++) CPU_SET(i, mask); } #endif /* SMP */ #define SCD_PHYSADDR 0x10000000 #define SCD_SIZE 0x00060000 static int scd_probe(device_t dev) { device_set_desc(dev, "Broadcom/Sibyte System Control and Debug"); return (0); } static int scd_attach(device_t dev) { int rid; struct resource *res; if (bootverbose) device_printf(dev, "attached.\n"); rid = 0; res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, SCD_PHYSADDR, SCD_PHYSADDR + SCD_SIZE - 1, SCD_SIZE, 0); if (res == NULL) panic("Cannot allocate resource for system control and debug."); return (0); } static device_method_t scd_methods[] ={ /* Device interface */ DEVMETHOD(device_probe, scd_probe), DEVMETHOD(device_attach, scd_attach), DEVMETHOD(device_detach, bus_generic_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD(device_suspend, bus_generic_suspend), DEVMETHOD(device_resume, bus_generic_resume), { 0, 0 } }; static driver_t scd_driver = { "scd", scd_methods }; static devclass_t scd_devclass; DRIVER_MODULE(scd, zbbus, scd_driver, scd_devclass, 0, 0);