1 /* 2 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 * Rajeshwar Ranga: Interrupt Distribution Unit API's 9 */ 10 11 #ifndef __PLAT_ARCFPGA_SMP_H 12 #define __PLAT_ARCFPGA_SMP_H 13 14 #ifdef CONFIG_SMP 15 16 #include <linux/types.h> 17 #include <asm/arcregs.h> 18 19 #define ARC_AUX_IDU_REG_CMD 0x2000 20 #define ARC_AUX_IDU_REG_PARAM 0x2001 21 22 #define ARC_AUX_XTL_REG_CMD 0x2002 23 #define ARC_AUX_XTL_REG_PARAM 0x2003 24 25 #define ARC_REG_MP_BCR 0x2021 26 27 #define ARC_XTL_CMD_WRITE_PC 0x04 28 #define ARC_XTL_CMD_CLEAR_HALT 0x02 29 30 /* 31 * Build Configuration Register which identifies the sub-components 32 */ 33 struct bcr_mp { 34 #ifdef CONFIG_CPU_BIG_ENDIAN 35 unsigned int mp_arch:16, pad:5, sdu:1, idu:1, scu:1, ver:8; 36 #else 37 unsigned int ver:8, scu:1, idu:1, sdu:1, pad:5, mp_arch:16; 38 #endif 39 }; 40 41 /* IDU supports 256 common interrupts */ 42 #define NR_IDU_IRQS 256 43 44 /* 45 * The Aux Regs layout is same bit-by-bit in both BE/LE modes. 46 * However when casted as a bitfield encoded "C" struct, gcc treats it as 47 * memory, generating different code for BE/LE, requiring strcture adj (see 48 * include/asm/arcregs.h) 49 * 50 * However when manually "carving" the value for a Aux, no special handling 51 * of BE is needed because of the property discribed above 52 */ 53 #define IDU_SET_COMMAND(irq, cmd) \ 54 do { \ 55 uint32_t __val; \ 56 __val = (((irq & 0xFF) << 8) | (cmd & 0xFF)); \ 57 write_aux_reg(ARC_AUX_IDU_REG_CMD, __val); \ 58 } while (0) 59 60 #define IDU_SET_PARAM(par) write_aux_reg(ARC_AUX_IDU_REG_PARAM, par) 61 #define IDU_GET_PARAM() read_aux_reg(ARC_AUX_IDU_REG_PARAM) 62 63 /* IDU Commands */ 64 #define IDU_DISABLE 0x00 65 #define IDU_ENABLE 0x01 66 #define IDU_IRQ_CLEAR 0x02 67 #define IDU_IRQ_ASSERT 0x03 68 #define IDU_IRQ_WMODE 0x04 69 #define IDU_IRQ_STATUS 0x05 70 #define IDU_IRQ_ACK 0x06 71 #define IDU_IRQ_PEND 0x07 72 #define IDU_IRQ_RMODE 0x08 73 #define IDU_IRQ_WBITMASK 0x09 74 #define IDU_IRQ_RBITMASK 0x0A 75 76 #define idu_enable() IDU_SET_COMMAND(0, IDU_ENABLE) 77 #define idu_disable() IDU_SET_COMMAND(0, IDU_DISABLE) 78 79 #define idu_irq_assert(irq) IDU_SET_COMMAND((irq), IDU_IRQ_ASSERT) 80 #define idu_irq_clear(irq) IDU_SET_COMMAND((irq), IDU_IRQ_CLEAR) 81 82 /* IDU Interrupt Mode - Destination Encoding */ 83 #define IDU_IRQ_MOD_DISABLE 0x00 84 #define IDU_IRQ_MOD_ROUND_RECP 0x01 85 #define IDU_IRQ_MOD_TCPU_FIRSTRECP 0x02 86 #define IDU_IRQ_MOD_TCPU_ALLRECP 0x03 87 88 /* IDU Interrupt Mode - Triggering Mode */ 89 #define IDU_IRQ_MODE_LEVEL_TRIG 0x00 90 #define IDU_IRQ_MODE_PULSE_TRIG 0x01 91 92 #define IDU_IRQ_MODE_PARAM(dest_mode, trig_mode) \ 93 (((trig_mode & 0x01) << 15) | (dest_mode & 0xFF)) 94 95 struct idu_irq_config { 96 uint8_t irq; 97 uint8_t dest_mode; 98 uint8_t trig_mode; 99 }; 100 101 struct idu_irq_status { 102 uint8_t irq; 103 bool enabled; 104 bool status; 105 bool ack; 106 bool pend; 107 uint8_t next_rr; 108 }; 109 110 extern void idu_irq_set_tgtcpu(uint8_t irq, uint32_t mask); 111 extern void idu_irq_set_mode(uint8_t irq, uint8_t dest_mode, uint8_t trig_mode); 112 113 extern void iss_model_init_smp(unsigned int cpu); 114 extern void iss_model_init_early_smp(void); 115 116 #endif /* CONFIG_SMP */ 117 118 #endif 119