298 lines
10 KiB
C
298 lines
10 KiB
C
/*
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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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* Copyright (C) 2000, 07 MIPS Technologies, Inc.
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*/
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#ifndef __LINUX_IRQCHIP_MIPS_GIC_H
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#define __LINUX_IRQCHIP_MIPS_GIC_H
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#include <linux/clocksource.h>
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#include <linux/ioport.h>
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#define GIC_MAX_INTRS 256
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/* Constants */
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#define GIC_POL_POS 1
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#define GIC_POL_NEG 0
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#define GIC_TRIG_EDGE 1
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#define GIC_TRIG_LEVEL 0
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#define GIC_TRIG_DUAL_ENABLE 1
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#define GIC_TRIG_DUAL_DISABLE 0
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#define MSK(n) ((1 << (n)) - 1)
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/* Accessors */
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#define GIC_REG(segment, offset) (segment##_##SECTION_OFS + offset##_##OFS)
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/* GIC Address Space */
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#define SHARED_SECTION_OFS 0x0000
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#define SHARED_SECTION_SIZE 0x8000
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#define VPE_LOCAL_SECTION_OFS 0x8000
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#define VPE_LOCAL_SECTION_SIZE 0x4000
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#define VPE_OTHER_SECTION_OFS 0xc000
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#define VPE_OTHER_SECTION_SIZE 0x4000
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#define USM_VISIBLE_SECTION_OFS 0x10000
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#define USM_VISIBLE_SECTION_SIZE 0x10000
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/* Register Map for Shared Section */
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#define GIC_SH_CONFIG_OFS 0x0000
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/* Shared Global Counter */
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#define GIC_SH_COUNTER_31_00_OFS 0x0010
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/* 64-bit counter register for CM3 */
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#define GIC_SH_COUNTER_OFS GIC_SH_COUNTER_31_00_OFS
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#define GIC_SH_COUNTER_63_32_OFS 0x0014
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#define GIC_SH_REVISIONID_OFS 0x0020
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/* Convert an interrupt number to a byte offset/bit for multi-word registers */
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#define GIC_INTR_OFS(intr) ({ \
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unsigned bits = mips_cm_is64 ? 64 : 32; \
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unsigned reg_idx = (intr) / bits; \
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unsigned reg_width = bits / 8; \
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\
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reg_idx * reg_width; \
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})
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#define GIC_INTR_BIT(intr) ((intr) % (mips_cm_is64 ? 64 : 32))
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/* Polarity : Reset Value is always 0 */
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#define GIC_SH_SET_POLARITY_OFS 0x0100
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/* Triggering : Reset Value is always 0 */
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#define GIC_SH_SET_TRIGGER_OFS 0x0180
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/* Dual edge triggering : Reset Value is always 0 */
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#define GIC_SH_SET_DUAL_OFS 0x0200
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/* Set/Clear corresponding bit in Edge Detect Register */
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#define GIC_SH_WEDGE_OFS 0x0280
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/* Mask manipulation */
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#define GIC_SH_RMASK_OFS 0x0300
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#define GIC_SH_SMASK_OFS 0x0380
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/* Global Interrupt Mask Register (RO) - Bit Set == Interrupt enabled */
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#define GIC_SH_MASK_OFS 0x0400
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/* Pending Global Interrupts (RO) */
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#define GIC_SH_PEND_OFS 0x0480
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/* Maps Interrupt X to a Pin */
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#define GIC_SH_INTR_MAP_TO_PIN_BASE_OFS 0x0500
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#define GIC_SH_MAP_TO_PIN(intr) (4 * (intr))
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/* Maps Interrupt X to a VPE */
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#define GIC_SH_INTR_MAP_TO_VPE_BASE_OFS 0x2000
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#define GIC_SH_MAP_TO_VPE_REG_OFF(intr, vpe) \
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((32 * (intr)) + (((vpe) / 32) * 4))
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#define GIC_SH_MAP_TO_VPE_REG_BIT(vpe) (1 << ((vpe) % 32))
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/* Register Map for Local Section */
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#define GIC_VPE_CTL_OFS 0x0000
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#define GIC_VPE_PEND_OFS 0x0004
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#define GIC_VPE_MASK_OFS 0x0008
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#define GIC_VPE_RMASK_OFS 0x000c
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#define GIC_VPE_SMASK_OFS 0x0010
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#define GIC_VPE_WD_MAP_OFS 0x0040
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#define GIC_VPE_COMPARE_MAP_OFS 0x0044
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#define GIC_VPE_TIMER_MAP_OFS 0x0048
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#define GIC_VPE_FDC_MAP_OFS 0x004c
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#define GIC_VPE_PERFCTR_MAP_OFS 0x0050
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#define GIC_VPE_SWINT0_MAP_OFS 0x0054
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#define GIC_VPE_SWINT1_MAP_OFS 0x0058
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#define GIC_VPE_OTHER_ADDR_OFS 0x0080
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#define GIC_VP_IDENT_OFS 0x0088
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#define GIC_VPE_WD_CONFIG0_OFS 0x0090
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#define GIC_VPE_WD_COUNT0_OFS 0x0094
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#define GIC_VPE_WD_INITIAL0_OFS 0x0098
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#define GIC_VPE_COMPARE_LO_OFS 0x00a0
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/* 64-bit Compare register on CM3 */
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#define GIC_VPE_COMPARE_OFS GIC_VPE_COMPARE_LO_OFS
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#define GIC_VPE_COMPARE_HI_OFS 0x00a4
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#define GIC_VPE_EIC_SHADOW_SET_BASE_OFS 0x0100
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#define GIC_VPE_EIC_SS(intr) (4 * (intr))
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#define GIC_VPE_EIC_VEC_BASE_OFS 0x0800
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#define GIC_VPE_EIC_VEC(intr) (4 * (intr))
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#define GIC_VPE_TENABLE_NMI_OFS 0x1000
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#define GIC_VPE_TENABLE_YQ_OFS 0x1004
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#define GIC_VPE_TENABLE_INT_31_0_OFS 0x1080
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#define GIC_VPE_TENABLE_INT_63_32_OFS 0x1084
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/* User Mode Visible Section Register Map */
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#define GIC_UMV_SH_COUNTER_31_00_OFS 0x0000
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#define GIC_UMV_SH_COUNTER_63_32_OFS 0x0004
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/* Masks */
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#define GIC_SH_CONFIG_COUNTSTOP_SHF 28
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#define GIC_SH_CONFIG_COUNTSTOP_MSK (MSK(1) << GIC_SH_CONFIG_COUNTSTOP_SHF)
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#define GIC_SH_CONFIG_COUNTBITS_SHF 24
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#define GIC_SH_CONFIG_COUNTBITS_MSK (MSK(4) << GIC_SH_CONFIG_COUNTBITS_SHF)
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#define GIC_SH_CONFIG_NUMINTRS_SHF 16
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#define GIC_SH_CONFIG_NUMINTRS_MSK (MSK(8) << GIC_SH_CONFIG_NUMINTRS_SHF)
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#define GIC_SH_CONFIG_NUMVPES_SHF 0
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#define GIC_SH_CONFIG_NUMVPES_MSK (MSK(8) << GIC_SH_CONFIG_NUMVPES_SHF)
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#define GIC_SH_WEDGE_SET(intr) ((intr) | (0x1 << 31))
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#define GIC_SH_WEDGE_CLR(intr) ((intr) & ~(0x1 << 31))
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#define GIC_MAP_TO_PIN_SHF 31
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#define GIC_MAP_TO_PIN_MSK (MSK(1) << GIC_MAP_TO_PIN_SHF)
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#define GIC_MAP_TO_NMI_SHF 30
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#define GIC_MAP_TO_NMI_MSK (MSK(1) << GIC_MAP_TO_NMI_SHF)
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#define GIC_MAP_TO_YQ_SHF 29
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#define GIC_MAP_TO_YQ_MSK (MSK(1) << GIC_MAP_TO_YQ_SHF)
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#define GIC_MAP_SHF 0
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#define GIC_MAP_MSK (MSK(6) << GIC_MAP_SHF)
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/* GIC_VPE_CTL Masks */
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#define GIC_VPE_CTL_FDC_RTBL_SHF 4
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#define GIC_VPE_CTL_FDC_RTBL_MSK (MSK(1) << GIC_VPE_CTL_FDC_RTBL_SHF)
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#define GIC_VPE_CTL_SWINT_RTBL_SHF 3
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#define GIC_VPE_CTL_SWINT_RTBL_MSK (MSK(1) << GIC_VPE_CTL_SWINT_RTBL_SHF)
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#define GIC_VPE_CTL_PERFCNT_RTBL_SHF 2
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#define GIC_VPE_CTL_PERFCNT_RTBL_MSK (MSK(1) << GIC_VPE_CTL_PERFCNT_RTBL_SHF)
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#define GIC_VPE_CTL_TIMER_RTBL_SHF 1
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#define GIC_VPE_CTL_TIMER_RTBL_MSK (MSK(1) << GIC_VPE_CTL_TIMER_RTBL_SHF)
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#define GIC_VPE_CTL_EIC_MODE_SHF 0
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#define GIC_VPE_CTL_EIC_MODE_MSK (MSK(1) << GIC_VPE_CTL_EIC_MODE_SHF)
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/* GIC_VPE_PEND Masks */
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#define GIC_VPE_PEND_WD_SHF 0
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#define GIC_VPE_PEND_WD_MSK (MSK(1) << GIC_VPE_PEND_WD_SHF)
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#define GIC_VPE_PEND_CMP_SHF 1
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#define GIC_VPE_PEND_CMP_MSK (MSK(1) << GIC_VPE_PEND_CMP_SHF)
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#define GIC_VPE_PEND_TIMER_SHF 2
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#define GIC_VPE_PEND_TIMER_MSK (MSK(1) << GIC_VPE_PEND_TIMER_SHF)
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#define GIC_VPE_PEND_PERFCOUNT_SHF 3
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#define GIC_VPE_PEND_PERFCOUNT_MSK (MSK(1) << GIC_VPE_PEND_PERFCOUNT_SHF)
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#define GIC_VPE_PEND_SWINT0_SHF 4
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#define GIC_VPE_PEND_SWINT0_MSK (MSK(1) << GIC_VPE_PEND_SWINT0_SHF)
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#define GIC_VPE_PEND_SWINT1_SHF 5
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#define GIC_VPE_PEND_SWINT1_MSK (MSK(1) << GIC_VPE_PEND_SWINT1_SHF)
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#define GIC_VPE_PEND_FDC_SHF 6
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#define GIC_VPE_PEND_FDC_MSK (MSK(1) << GIC_VPE_PEND_FDC_SHF)
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/* GIC_VPE_RMASK Masks */
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#define GIC_VPE_RMASK_WD_SHF 0
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#define GIC_VPE_RMASK_WD_MSK (MSK(1) << GIC_VPE_RMASK_WD_SHF)
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#define GIC_VPE_RMASK_CMP_SHF 1
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#define GIC_VPE_RMASK_CMP_MSK (MSK(1) << GIC_VPE_RMASK_CMP_SHF)
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#define GIC_VPE_RMASK_TIMER_SHF 2
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#define GIC_VPE_RMASK_TIMER_MSK (MSK(1) << GIC_VPE_RMASK_TIMER_SHF)
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#define GIC_VPE_RMASK_PERFCNT_SHF 3
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#define GIC_VPE_RMASK_PERFCNT_MSK (MSK(1) << GIC_VPE_RMASK_PERFCNT_SHF)
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#define GIC_VPE_RMASK_SWINT0_SHF 4
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#define GIC_VPE_RMASK_SWINT0_MSK (MSK(1) << GIC_VPE_RMASK_SWINT0_SHF)
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#define GIC_VPE_RMASK_SWINT1_SHF 5
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#define GIC_VPE_RMASK_SWINT1_MSK (MSK(1) << GIC_VPE_RMASK_SWINT1_SHF)
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#define GIC_VPE_RMASK_FDC_SHF 6
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#define GIC_VPE_RMASK_FDC_MSK (MSK(1) << GIC_VPE_RMASK_FDC_SHF)
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/* GIC_VPE_SMASK Masks */
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#define GIC_VPE_SMASK_WD_SHF 0
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#define GIC_VPE_SMASK_WD_MSK (MSK(1) << GIC_VPE_SMASK_WD_SHF)
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#define GIC_VPE_SMASK_CMP_SHF 1
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#define GIC_VPE_SMASK_CMP_MSK (MSK(1) << GIC_VPE_SMASK_CMP_SHF)
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#define GIC_VPE_SMASK_TIMER_SHF 2
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#define GIC_VPE_SMASK_TIMER_MSK (MSK(1) << GIC_VPE_SMASK_TIMER_SHF)
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#define GIC_VPE_SMASK_PERFCNT_SHF 3
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#define GIC_VPE_SMASK_PERFCNT_MSK (MSK(1) << GIC_VPE_SMASK_PERFCNT_SHF)
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#define GIC_VPE_SMASK_SWINT0_SHF 4
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#define GIC_VPE_SMASK_SWINT0_MSK (MSK(1) << GIC_VPE_SMASK_SWINT0_SHF)
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#define GIC_VPE_SMASK_SWINT1_SHF 5
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#define GIC_VPE_SMASK_SWINT1_MSK (MSK(1) << GIC_VPE_SMASK_SWINT1_SHF)
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#define GIC_VPE_SMASK_FDC_SHF 6
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#define GIC_VPE_SMASK_FDC_MSK (MSK(1) << GIC_VPE_SMASK_FDC_SHF)
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/* GIC_VP_IDENT fields */
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#define GIC_VP_IDENT_VCNUM_SHF 0
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#define GIC_VP_IDENT_VCNUM_MSK (MSK(6) << GIC_VP_IDENT_VCNUM_SHF)
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/* GIC nomenclature for Core Interrupt Pins. */
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#define GIC_CPU_INT0 0 /* Core Interrupt 2 */
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#define GIC_CPU_INT1 1 /* . */
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#define GIC_CPU_INT2 2 /* . */
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#define GIC_CPU_INT3 3 /* . */
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#define GIC_CPU_INT4 4 /* . */
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#define GIC_CPU_INT5 5 /* Core Interrupt 7 */
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/* Add 2 to convert GIC CPU pin to core interrupt */
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#define GIC_CPU_PIN_OFFSET 2
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/* Add 2 to convert non-EIC hardware interrupt to EIC vector number. */
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#define GIC_CPU_TO_VEC_OFFSET 2
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/* Mapped interrupt to pin X, then GIC will generate the vector (X+1). */
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#define GIC_PIN_TO_VEC_OFFSET 1
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/* Local GIC interrupts. */
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#define GIC_LOCAL_INT_WD 0 /* GIC watchdog */
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#define GIC_LOCAL_INT_COMPARE 1 /* GIC count and compare timer */
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#define GIC_LOCAL_INT_TIMER 2 /* CPU timer interrupt */
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#define GIC_LOCAL_INT_PERFCTR 3 /* CPU performance counter */
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#define GIC_LOCAL_INT_SWINT0 4 /* CPU software interrupt 0 */
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#define GIC_LOCAL_INT_SWINT1 5 /* CPU software interrupt 1 */
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#define GIC_LOCAL_INT_FDC 6 /* CPU fast debug channel */
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#define GIC_NUM_LOCAL_INTRS 7
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/* Convert between local/shared IRQ number and GIC HW IRQ number. */
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#define GIC_LOCAL_HWIRQ_BASE 0
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#define GIC_LOCAL_TO_HWIRQ(x) (GIC_LOCAL_HWIRQ_BASE + (x))
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#define GIC_HWIRQ_TO_LOCAL(x) ((x) - GIC_LOCAL_HWIRQ_BASE)
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#define GIC_SHARED_HWIRQ_BASE GIC_NUM_LOCAL_INTRS
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#define GIC_SHARED_TO_HWIRQ(x) (GIC_SHARED_HWIRQ_BASE + (x))
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#define GIC_HWIRQ_TO_SHARED(x) ((x) - GIC_SHARED_HWIRQ_BASE)
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#ifdef CONFIG_MIPS_GIC
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extern unsigned int gic_present;
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extern void gic_init(unsigned long gic_base_addr,
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unsigned long gic_addrspace_size, unsigned int cpu_vec,
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unsigned int irqbase);
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extern void gic_clocksource_init(unsigned int);
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extern cycle_t gic_read_count(void);
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extern unsigned int gic_get_count_width(void);
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extern cycle_t gic_read_compare(void);
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extern void gic_write_compare(cycle_t cnt);
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extern void gic_write_cpu_compare(cycle_t cnt, int cpu);
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extern void gic_start_count(void);
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extern void gic_stop_count(void);
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extern int gic_get_c0_compare_int(void);
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extern int gic_get_c0_perfcount_int(void);
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extern int gic_get_c0_fdc_int(void);
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extern int gic_get_usm_range(struct resource *gic_usm_res);
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#else /* CONFIG_MIPS_GIC */
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#define gic_present 0
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static inline int gic_get_usm_range(struct resource *gic_usm_res)
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{
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/* Shouldn't be called. */
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return -1;
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}
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#endif /* CONFIG_MIPS_GIC */
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/**
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* gic_read_local_vp_id() - read the local VPs VCNUM
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*
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* Read the VCNUM of the local VP from the GIC_VP_IDENT register and
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* return it to the caller. This ID should be used to refer to the VP
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* via the GICs VP-other region, or when calculating an offset to a
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* bit representing the VP in interrupt masks.
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*
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* Return: The VCNUM value for the local VP.
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*/
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extern unsigned gic_read_local_vp_id(void);
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#endif /* __LINUX_IRQCHIP_MIPS_GIC_H */
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