/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2011 Semihalf. * 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. * * From: FreeBSD: src/sys/arm/mv/kirkwood/sheevaplug.c,v 1.2 2010/06/13 13:28:53 */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #define CPU_FREQ_FIELD(sar) (((0x01 & (sar >> 52)) << 3) | \ (0x07 & (sar >> 21))) #define FAB_FREQ_FIELD(sar) (((0x01 & (sar >> 51)) << 4) | \ (0x0F & (sar >> 24))) static uint32_t count_l2clk(void); void armadaxp_l2_init(void); void armadaxp_init_coher_fabric(void); int platform_get_ncpus(void); static uint64_t get_sar_value_armadaxp(void); #define ARMADAXP_L2_BASE (MV_BASE + 0x8000) #define ARMADAXP_L2_CTRL 0x100 #define L2_ENABLE (1 << 0) #define ARMADAXP_L2_AUX_CTRL 0x104 #define L2_WBWT_MODE_MASK (3 << 0) #define L2_WBWT_MODE_PAGE 0 #define L2_WBWT_MODE_WB 1 #define L2_WBWT_MODE_WT 2 #define L2_REP_STRAT_MASK (3 << 27) #define L2_REP_STRAT_LSFR (1 << 27) #define L2_REP_STRAT_SEMIPLRU (3 << 27) #define ARMADAXP_L2_CNTR_CTRL 0x200 #define ARMADAXP_L2_CNTR_CONF(x) (0x204 + (x) * 0xc) #define ARMADAXP_L2_CNTR2_VAL_LOW (0x208 + (x) * 0xc) #define ARMADAXP_L2_CNTR2_VAL_HI (0x20c + (x) * 0xc) #define ARMADAXP_L2_INT_CAUSE 0x220 #define ARMADAXP_L2_SYNC_BARRIER 0x700 #define ARMADAXP_L2_INV_WAY 0x778 #define ARMADAXP_L2_CLEAN_WAY 0x7BC #define ARMADAXP_L2_FLUSH_PHYS 0x7F0 #define ARMADAXP_L2_FLUSH_WAY 0x7FC #define MV_COHERENCY_FABRIC_BASE (MV_MBUS_BRIDGE_BASE + 0x200) #define COHER_FABRIC_CTRL 0x00 #define COHER_FABRIC_CONF 0x04 #define COHER_FABRIC_CFU 0x28 #define COHER_FABRIC_CIB_CTRL 0x80 struct vco_freq_ratio { uint8_t vco_cpu; /* VCO to CLK0(CPU) clock ratio */ uint8_t vco_l2c; /* VCO to NB(L2 cache) clock ratio */ uint8_t vco_hcl; /* VCO to HCLK(DDR controller) clock ratio */ uint8_t vco_ddr; /* VCO to DR(DDR memory) clock ratio */ }; static struct vco_freq_ratio freq_conf_table[] = { /*00*/ { 1, 1, 4, 2 }, /*01*/ { 1, 2, 2, 2 }, /*02*/ { 2, 2, 6, 3 }, /*03*/ { 2, 2, 3, 3 }, /*04*/ { 1, 2, 3, 3 }, /*05*/ { 1, 2, 4, 2 }, /*06*/ { 1, 1, 2, 2 }, /*07*/ { 2, 3, 6, 6 }, /*08*/ { 2, 3, 5, 5 }, /*09*/ { 1, 2, 6, 3 }, /*10*/ { 2, 4, 10, 5 }, /*11*/ { 1, 3, 6, 6 }, /*12*/ { 1, 2, 5, 5 }, /*13*/ { 1, 3, 6, 3 }, /*14*/ { 1, 2, 5, 5 }, /*15*/ { 2, 2, 5, 5 }, /*16*/ { 1, 1, 3, 3 }, /*17*/ { 2, 5, 10, 10 }, /*18*/ { 1, 3, 8, 4 }, /*19*/ { 1, 1, 2, 1 }, /*20*/ { 2, 3, 6, 3 }, /*21*/ { 1, 2, 8, 4 }, /*22*/ { 2, 5, 10, 5 } }; static uint16_t cpu_clock_table[] = { 1000, 1066, 1200, 1333, 1500, 1666, 1800, 2000, 600, 667, 800, 1600, 2133, 2200, 2400 }; static uint64_t get_sar_value_armadaxp(void) { uint32_t sar_low, sar_high; sar_high = bus_space_read_4(fdtbus_bs_tag, MV_MISC_BASE, SAMPLE_AT_RESET_HI); sar_low = bus_space_read_4(fdtbus_bs_tag, MV_MISC_BASE, SAMPLE_AT_RESET_LO); return (((uint64_t)sar_high << 32) | sar_low); } uint32_t get_tclk_armadaxp(void) { uint32_t cputype; cputype = cp15_midr_get(); cputype &= CPU_ID_CPU_MASK; if (cputype == CPU_ID_MV88SV584X_V7) return (TCLK_250MHZ); else return (TCLK_200MHZ); } uint32_t get_cpu_freq_armadaxp(void) { return (0); } static uint32_t count_l2clk(void) { uint64_t sar_reg; uint32_t freq_vco, freq_l2clk; uint8_t sar_cpu_freq, sar_fab_freq, array_size; /* Get value of the SAR register and process it */ sar_reg = get_sar_value_armadaxp(); sar_cpu_freq = CPU_FREQ_FIELD(sar_reg); sar_fab_freq = FAB_FREQ_FIELD(sar_reg); /* Check if CPU frequency field has correct value */ array_size = nitems(cpu_clock_table); if (sar_cpu_freq >= array_size) panic("Reserved value in cpu frequency configuration field: " "%d", sar_cpu_freq); /* Check if fabric frequency field has correct value */ array_size = nitems(freq_conf_table); if (sar_fab_freq >= array_size) panic("Reserved value in fabric frequency configuration field: " "%d", sar_fab_freq); /* Get CPU clock frequency */ freq_vco = cpu_clock_table[sar_cpu_freq] * freq_conf_table[sar_fab_freq].vco_cpu; /* Get L2CLK clock frequency */ freq_l2clk = freq_vco / freq_conf_table[sar_fab_freq].vco_l2c; /* Round L2CLK value to integer MHz */ if (((freq_vco % freq_conf_table[sar_fab_freq].vco_l2c) * 10 / freq_conf_table[sar_fab_freq].vco_l2c) >= 5) freq_l2clk++; return (freq_l2clk * 1000000); } uint32_t get_l2clk(void) { static uint32_t l2clk_freq = 0; /* If get_l2clk is called first time get L2CLK value from register */ if (l2clk_freq == 0) l2clk_freq = count_l2clk(); return (l2clk_freq); } static uint32_t read_coher_fabric(uint32_t reg) { return (bus_space_read_4(fdtbus_bs_tag, MV_COHERENCY_FABRIC_BASE, reg)); } static void write_coher_fabric(uint32_t reg, uint32_t val) { bus_space_write_4(fdtbus_bs_tag, MV_COHERENCY_FABRIC_BASE, reg, val); } int platform_get_ncpus(void) { #if !defined(SMP) return (1); #else return ((read_coher_fabric(COHER_FABRIC_CONF) & 0xf) + 1); #endif } void armadaxp_init_coher_fabric(void) { uint32_t val, cpus, mask; cpus = platform_get_ncpus(); mask = (1 << cpus) - 1; val = read_coher_fabric(COHER_FABRIC_CTRL); val |= (mask << 24); write_coher_fabric(COHER_FABRIC_CTRL, val); val = read_coher_fabric(COHER_FABRIC_CONF); val |= (mask << 24); val |= (1 << 15); write_coher_fabric(COHER_FABRIC_CONF, val); } #define ALL_WAYS 0xffffffff /* L2 cache configuration registers */ static uint32_t read_l2_cache(uint32_t reg) { return (bus_space_read_4(fdtbus_bs_tag, ARMADAXP_L2_BASE, reg)); } static void write_l2_cache(uint32_t reg, uint32_t val) { bus_space_write_4(fdtbus_bs_tag, ARMADAXP_L2_BASE, reg, val); } static void armadaxp_l2_idcache_inv_all(void) { write_l2_cache(ARMADAXP_L2_INV_WAY, ALL_WAYS); } void armadaxp_l2_init(void) { u_int32_t reg; /* Set L2 policy */ reg = read_l2_cache(ARMADAXP_L2_AUX_CTRL); reg &= ~(L2_WBWT_MODE_MASK); reg &= ~(L2_REP_STRAT_MASK); reg |= L2_REP_STRAT_SEMIPLRU; reg |= L2_WBWT_MODE_WT; write_l2_cache(ARMADAXP_L2_AUX_CTRL, reg); /* Invalidate l2 cache */ armadaxp_l2_idcache_inv_all(); /* Clear pending L2 interrupts */ write_l2_cache(ARMADAXP_L2_INT_CAUSE, 0x1ff); /* Enable l2 cache */ reg = read_l2_cache(ARMADAXP_L2_CTRL); write_l2_cache(ARMADAXP_L2_CTRL, reg | L2_ENABLE); /* * For debug purposes * Configure and enable counter */ write_l2_cache(ARMADAXP_L2_CNTR_CONF(0), 0xf0000 | (4 << 2)); write_l2_cache(ARMADAXP_L2_CNTR_CONF(1), 0xf0000 | (2 << 2)); write_l2_cache(ARMADAXP_L2_CNTR_CTRL, 0x303); /* * Enable Cache maintenance operation propagation in coherency fabric * Change point of coherency and point of unification to DRAM. */ reg = read_coher_fabric(COHER_FABRIC_CFU); reg |= (1 << 17) | (1 << 18); write_coher_fabric(COHER_FABRIC_CFU, reg); /* Coherent IO Bridge initialization */ reg = read_coher_fabric(COHER_FABRIC_CIB_CTRL); reg &= ~(7 << 16); reg |= (7 << 16); write_coher_fabric(COHER_FABRIC_CIB_CTRL, reg); }