Merge remote-tracking branch 'remotes/lalrae/tags/mips-20160712' into staging

MIPS patches 2016-07-12

Changes:
* support 10-bit ASIDs
* MIPS64R6-generic renamed to I6400
* initial GIC support
* implement RESET_BASE register in CM GCR

# gpg: Signature made Tue 12 Jul 2016 11:49:50 BST
# gpg:                using RSA key 0x52118E3C0B29DA6B
# gpg: Good signature from "Leon Alrae <leon.alrae@imgtec.com>"
# Primary key fingerprint: 8DD3 2F98 5495 9D66 35D4  4FC0 5211 8E3C 0B29 DA6B

* remotes/lalrae/tags/mips-20160712:
  target-mips: enable 10-bit ASIDs in I6400 CPU
  target-mips: support CP0.Config4.AE bit
  target-mips: change ASID type to hold more than 8 bits
  target-mips: add ASID mask field and replace magic values
  target-mips: replace MIPS64R6-generic with the real I6400 CPU model
  hw/mips_cmgcr: implement RESET_BASE register in CM GCR
  hw/mips_cpc: make VP correctly start from the reset vector
  target-mips: add exception base to MIPS CPU
  hw/mips/cps: create GIC block inside CPS
  hw/mips: implement Global Interrupt Controller
  hw/mips: implement GIC Interval Timer

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

4 files changed, 291 insertions, 0 deletions

diff --git a/include/hw/intc/mips_gic.h b/include/hw/intc/mips_gic.h
new file mode 100644
index 0000000000..dd6d44d731
--- /dev/null
+++ b/include/hw/intc/mips_gic.h
@@ -0,0 +1,216 @@
+/*
+ * 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) 2000, 07 MIPS Technologies, Inc.
+ * Copyright (C) 2016 Imagination Technologies
+ *
+ */
+
+#ifndef _MIPS_GIC_H
+#define _MIPS_GIC_H
+
+#include "hw/timer/mips_gictimer.h"
+#include "cpu.h"
+/*
+ * GIC Specific definitions
+ */
+
+/* The MIPS default location */
+#define GIC_BASE_ADDR           0x1bdc0000ULL
+#define GIC_ADDRSPACE_SZ        (128 * 1024)
+
+/* Constants */
+#define GIC_POL_POS     1
+#define GIC_POL_NEG     0
+#define GIC_TRIG_EDGE   1
+#define GIC_TRIG_LEVEL  0
+
+#define MSK(n)              ((1ULL << (n)) - 1)
+
+/* GIC Address Space */
+#define SHARED_SECTION_OFS          0x0000
+#define SHARED_SECTION_SIZE         0x8000
+#define VP_LOCAL_SECTION_OFS        0x8000
+#define VP_LOCAL_SECTION_SIZE       0x4000
+#define VP_OTHER_SECTION_OFS        0xc000
+#define VP_OTHER_SECTION_SIZE       0x4000
+#define USM_VISIBLE_SECTION_OFS     0x10000
+#define USM_VISIBLE_SECTION_SIZE    0x10000
+
+/* Register Map for Shared Section */
+
+#define GIC_SH_CONFIG_OFS           0x0000
+
+/* Shared Global Counter */
+#define GIC_SH_COUNTERLO_OFS        0x0010
+#define GIC_SH_COUNTERHI_OFS        0x0014
+#define GIC_SH_REVISIONID_OFS       0x0020
+
+/* Set/Clear corresponding bit in Edge Detect Register */
+#define GIC_SH_WEDGE_OFS            0x0280
+
+/* Reset Mask - Disables Interrupt */
+#define GIC_SH_RMASK_OFS            0x0300
+#define GIC_SH_RMASK_LAST_OFS       0x031c
+
+/* Set Mask (WO) - Enables Interrupt */
+#define GIC_SH_SMASK_OFS            0x0380
+#define GIC_SH_SMASK_LAST_OFS       0x039c
+
+/* Global Interrupt Mask Register (RO) - Bit Set == Interrupt enabled */
+#define GIC_SH_MASK_OFS             0x0400
+#define GIC_SH_MASK_LAST_OFS        0x041c
+
+/* Pending Global Interrupts (RO) */
+#define GIC_SH_PEND_OFS             0x0480
+#define GIC_SH_PEND_LAST_OFS        0x049c
+
+#define GIC_SH_MAP0_PIN_OFS         0x0500
+#define GIC_SH_MAP255_PIN_OFS       0x08fc
+
+#define GIC_SH_MAP0_VP_OFS          0x2000
+#define GIC_SH_MAP255_VP_LAST_OFS   0x3fe4
+
+/* Register Map for Local Section */
+#define GIC_VP_CTL_OFS              0x0000
+#define GIC_VP_PEND_OFS             0x0004
+#define GIC_VP_MASK_OFS             0x0008
+#define GIC_VP_RMASK_OFS            0x000c
+#define GIC_VP_SMASK_OFS            0x0010
+#define GIC_VP_WD_MAP_OFS           0x0040
+#define GIC_VP_COMPARE_MAP_OFS      0x0044
+#define GIC_VP_TIMER_MAP_OFS        0x0048
+#define GIC_VP_FDC_MAP_OFS          0x004c
+#define GIC_VP_PERFCTR_MAP_OFS      0x0050
+#define GIC_VP_SWINT0_MAP_OFS       0x0054
+#define GIC_VP_SWINT1_MAP_OFS       0x0058
+#define GIC_VP_OTHER_ADDR_OFS       0x0080
+#define GIC_VP_IDENT_OFS            0x0088
+#define GIC_VP_WD_CONFIG0_OFS       0x0090
+#define GIC_VP_WD_COUNT0_OFS        0x0094
+#define GIC_VP_WD_INITIAL0_OFS      0x0098
+#define GIC_VP_COMPARE_LO_OFS       0x00a0
+#define GIC_VP_COMPARE_HI_OFS       0x00a4
+#define GIC_VL_BRK_GROUP            0x3080
+
+/* User-Mode Visible Section Register */
+/* Read-only alias for GIC Shared CounterLo */
+#define GIC_USER_MODE_COUNTERLO     0x0000
+/* Read-only alias for GIC Shared CounterHi */
+#define GIC_USER_MODE_COUNTERHI     0x0004
+
+/* Masks */
+#define GIC_SH_CONFIG_COUNTSTOP_SHF     28
+#define GIC_SH_CONFIG_COUNTSTOP_MSK     (MSK(1) << GIC_SH_CONFIG_COUNTSTOP_SHF)
+#define GIC_SH_CONFIG_COUNTBITS_SHF     24
+#define GIC_SH_CONFIG_COUNTBITS_MSK     (MSK(4) << GIC_SH_CONFIG_COUNTBITS_SHF)
+#define GIC_SH_CONFIG_NUMINTRS_SHF      16
+#define GIC_SH_CONFIG_NUMINTRS_MSK      (MSK(8) << GIC_SH_CONFIG_NUMINTRS_SHF)
+#define GIC_SH_CONFIG_PVPS_SHF          0
+#define GIC_SH_CONFIG_PVPS_MSK          (MSK(8) << GIC_SH_CONFIG_NUMVPS_SHF)
+
+#define GIC_SH_WEDGE_RW_SHF             31
+#define GIC_SH_WEDGE_RW_MSK             (MSK(1) << GIC_SH_WEDGE_RW_SHF)
+
+#define GIC_MAP_TO_PIN_SHF              31
+#define GIC_MAP_TO_PIN_MSK              (MSK(1) << GIC_MAP_TO_PIN_SHF)
+#define GIC_MAP_TO_NMI_SHF              30
+#define GIC_MAP_TO_NMI_MSK              (MSK(1) << GIC_MAP_TO_NMI_SHF)
+#define GIC_MAP_TO_YQ_SHF               29
+#define GIC_MAP_TO_YQ_MSK               (MSK(1) << GIC_MAP_TO_YQ_SHF)
+#define GIC_MAP_SHF                     0
+#define GIC_MAP_MSK                     (MSK(6) << GIC_MAP_SHF)
+#define GIC_MAP_TO_PIN_REG_MSK          \
+    (GIC_MAP_TO_PIN_MSK | GIC_MAP_TO_NMI_MSK | GIC_MAP_TO_YQ_MSK | GIC_MAP_MSK)
+
+/* GIC_VP_CTL Masks */
+#define GIC_VP_CTL_FDC_RTBL_SHF         4
+#define GIC_VP_CTL_FDC_RTBL_MSK         (MSK(1) << GIC_VP_CTL_FDC_RTBL_SHF)
+#define GIC_VP_CTL_SWINT_RTBL_SHF       3
+#define GIC_VP_CTL_SWINT_RTBL_MSK       (MSK(1) << GIC_VP_CTL_SWINT_RTBL_SHF)
+#define GIC_VP_CTL_PERFCNT_RTBL_SHF     2
+#define GIC_VP_CTL_PERFCNT_RTBL_MSK     (MSK(1) << GIC_VP_CTL_PERFCNT_RTBL_SHF)
+#define GIC_VP_CTL_TIMER_RTBL_SHF       1
+#define GIC_VP_CTL_TIMER_RTBL_MSK       (MSK(1) << GIC_VP_CTL_TIMER_RTBL_SHF)
+#define GIC_VP_CTL_EIC_MODE_SHF         0
+#define GIC_VP_CTL_EIC_MODE_MSK         (MSK(1) << GIC_VP_CTL_EIC_MODE_SHF)
+
+/* GIC_VP_MASK Masks */
+#define GIC_VP_MASK_FDC_SHF         6
+#define GIC_VP_MASK_FDC_MSK         (MSK(1) << GIC_VP_MASK_FDC_SHF)
+#define GIC_VP_MASK_SWINT1_SHF      5
+#define GIC_VP_MASK_SWINT1_MSK      (MSK(1) << GIC_VP_MASK_SWINT1_SHF)
+#define GIC_VP_MASK_SWINT0_SHF      4
+#define GIC_VP_MASK_SWINT0_MSK      (MSK(1) << GIC_VP_MASK_SWINT0_SHF)
+#define GIC_VP_MASK_PERFCNT_SHF     3
+#define GIC_VP_MASK_PERFCNT_MSK     (MSK(1) << GIC_VP_MASK_PERFCNT_SHF)
+#define GIC_VP_MASK_TIMER_SHF       2
+#define GIC_VP_MASK_TIMER_MSK       (MSK(1) << GIC_VP_MASK_TIMER_SHF)
+#define GIC_VP_MASK_CMP_SHF         1
+#define GIC_VP_MASK_CMP_MSK         (MSK(1) << GIC_VP_MASK_CMP_SHF)
+#define GIC_VP_MASK_WD_SHF          0
+#define GIC_VP_MASK_WD_MSK          (MSK(1) << GIC_VP_MASK_WD_SHF)
+#define GIC_VP_SET_RESET_MSK        (MSK(7) << GIC_VP_MASK_WD_SHF)
+
+#define GIC_CPU_INT_MAX             5 /* Core Interrupt 7 */
+#define GIC_CPU_PIN_OFFSET          2
+
+/* Local GIC interrupts. */
+#define GIC_NUM_LOCAL_INTRS     7
+#define GIC_LOCAL_INT_FDC       6 /* CPU fast debug channel */
+#define GIC_LOCAL_INT_SWINT1    5 /* CPU software interrupt 1 */
+#define GIC_LOCAL_INT_SWINT0    4 /* CPU software interrupt 0 */
+#define GIC_LOCAL_INT_PERFCTR   3 /* CPU performance counter */
+#define GIC_LOCAL_INT_TIMER     2 /* CPU timer interrupt */
+#define GIC_LOCAL_INT_COMPARE   1 /* GIC count and compare timer */
+#define GIC_LOCAL_INT_WD        0 /* GIC watchdog */
+
+#define TYPE_MIPS_GIC "mips-gic"
+#define MIPS_GIC(obj) OBJECT_CHECK(MIPSGICState, (obj), TYPE_MIPS_GIC)
+
+/* Support up to 32 VPs and 256 IRQs */
+#define GIC_MAX_VPS             32
+#define GIC_MAX_INTRS           256
+
+typedef struct MIPSGICState MIPSGICState;
+typedef struct MIPSGICIRQState MIPSGICIRQState;
+typedef struct MIPSGICVPState MIPSGICVPState;
+
+struct MIPSGICIRQState {
+    uint8_t enabled;
+    uint8_t pending;
+    uint32_t map_pin;
+    int32_t map_vp;
+    qemu_irq irq;
+};
+
+struct MIPSGICVPState {
+    uint32_t ctl;
+    uint32_t pend;
+    uint32_t mask;
+    uint32_t compare_map;
+    uint32_t other_addr;
+    CPUMIPSState *env;
+};
+
+struct MIPSGICState {
+    SysBusDevice parent_obj;
+    MemoryRegion mr;
+
+    /* Shared Section Registers */
+    uint32_t sh_config;
+    MIPSGICIRQState *irq_state;
+
+    /* VP Local/Other Section Registers */
+    MIPSGICVPState *vps;
+
+    /* GIC VP Timer */
+    MIPSGICTimerState *gic_timer;
+
+    int32_t num_vps;
+    int32_t num_irq;
+};
+
+#endif /* _MIPS_GIC_H */
diff --git a/include/hw/mips/cps.h b/include/hw/mips/cps.h
index 4dbae9c8c9..526b8d0b11 100644
--- a/include/hw/mips/cps.h
+++ b/include/hw/mips/cps.h
@@ -22,6 +22,7 @@
 
 #include "hw/sysbus.h"
 #include "hw/misc/mips_cmgcr.h"
+#include "hw/intc/mips_gic.h"
 #include "hw/misc/mips_cpc.h"
 #include "hw/misc/mips_itu.h"
 
@@ -37,6 +38,7 @@ typedef struct MIPSCPSState {
 
     MemoryRegion container;
     MIPSGCRState gcr;
+    MIPSGICState gic;
     MIPSCPCState cpc;
     MIPSITUState itu;
 } MIPSCPSState;
diff --git a/include/hw/misc/mips_cmgcr.h b/include/hw/misc/mips_cmgcr.h
index cc60eefa53..690e1d6221 100644
--- a/include/hw/misc/mips_cmgcr.h
+++ b/include/hw/misc/mips_cmgcr.h
@@ -26,23 +26,45 @@
 #define GCR_CONFIG_OFS      0x0000
 #define GCR_BASE_OFS        0x0008
 #define GCR_REV_OFS         0x0030
+#define GCR_GIC_BASE_OFS    0x0080
 #define GCR_CPC_BASE_OFS    0x0088
+#define GCR_GIC_STATUS_OFS  0x00D0
 #define GCR_CPC_STATUS_OFS  0x00F0
 #define GCR_L2_CONFIG_OFS   0x0130
 
 /* Core Local and Core Other Block Register Map */
 #define GCR_CL_CONFIG_OFS   0x0010
 #define GCR_CL_OTHER_OFS    0x0018
+#define GCR_CL_RESETBASE_OFS 0x0020
 
 /* GCR_L2_CONFIG register fields */
 #define GCR_L2_CONFIG_BYPASS_SHF    20
 #define GCR_L2_CONFIG_BYPASS_MSK    ((0x1ULL) << GCR_L2_CONFIG_BYPASS_SHF)
 
+/* GCR_GIC_BASE register fields */
+#define GCR_GIC_BASE_GICEN_MSK   1
+#define GCR_GIC_BASE_GICBASE_MSK 0xFFFFFFFE0000ULL
+#define GCR_GIC_BASE_MSK (GCR_GIC_BASE_GICEN_MSK | GCR_GIC_BASE_GICBASE_MSK)
+
 /* GCR_CPC_BASE register fields */
 #define GCR_CPC_BASE_CPCEN_MSK   1
 #define GCR_CPC_BASE_CPCBASE_MSK 0xFFFFFFFF8000ULL
 #define GCR_CPC_BASE_MSK (GCR_CPC_BASE_CPCEN_MSK | GCR_CPC_BASE_CPCBASE_MSK)
 
+/* GCR_CL_OTHER_OFS register fields */
+#define GCR_CL_OTHER_VPOTHER_MSK 0x7
+#define GCR_CL_OTHER_MSK GCR_CL_OTHER_VPOTHER_MSK
+
+/* GCR_CL_RESETBASE_OFS register fields */
+#define GCR_CL_RESET_BASE_RESETBASE_MSK 0xFFFFF000U
+#define GCR_CL_RESET_BASE_MSK GCR_CL_RESET_BASE_RESETBASE_MSK
+
+typedef struct MIPSGCRVPState MIPSGCRVPState;
+struct MIPSGCRVPState {
+    uint32_t other;
+    uint64_t reset_base;
+};
+
 typedef struct MIPSGCRState MIPSGCRState;
 struct MIPSGCRState {
     SysBusDevice parent_obj;
@@ -52,8 +74,13 @@ struct MIPSGCRState {
     hwaddr gcr_base;
     MemoryRegion iomem;
     MemoryRegion *cpc_mr;
+    MemoryRegion *gic_mr;
 
     uint64_t cpc_base;
+    uint64_t gic_base;
+
+    /* VP Local/Other Registers */
+    MIPSGCRVPState *vps;
 };
 
 #endif /* _MIPS_GCR_H */
diff --git a/include/hw/timer/mips_gictimer.h b/include/hw/timer/mips_gictimer.h
new file mode 100644
index 0000000000..e3ca45c533
--- /dev/null
+++ b/include/hw/timer/mips_gictimer.h
@@ -0,0 +1,46 @@
+/*
+ * 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) 2016 Imagination Technologies
+ *
+ */
+
+#ifndef _MIPS_GICTIMER_H_
+#define _MIPS_GICTIMER_H_
+
+typedef struct MIPSGICTimerVPState MIPSGICTimerVPState;
+typedef struct MIPSGICTimerState MIPSGICTimerState;
+
+typedef void MIPSGICTimerCB(void *opaque, uint32_t vp_index);
+
+struct MIPSGICTimerVPState {
+    QEMUTimer *qtimer;
+    uint32_t vp_index;
+    uint32_t comparelo;
+    MIPSGICTimerState *gictimer;
+};
+
+struct MIPSGICTimerState {
+    void *opaque;
+    uint8_t countstop;
+    uint32_t sh_counterlo;
+    int32_t num_vps;
+    MIPSGICTimerVPState *vptimers;
+    MIPSGICTimerCB *cb;
+};
+
+uint32_t mips_gictimer_get_sh_count(MIPSGICTimerState *gic);
+void mips_gictimer_store_sh_count(MIPSGICTimerState *gic, uint64_t count);
+uint32_t mips_gictimer_get_vp_compare(MIPSGICTimerState *gictimer,
+                                      uint32_t vp_index);
+void mips_gictimer_store_vp_compare(MIPSGICTimerState *gic, uint32_t vp_index,
+                                    uint64_t compare);
+uint8_t mips_gictimer_get_countstop(MIPSGICTimerState *gic);
+void mips_gictimer_start_count(MIPSGICTimerState *gic);
+void mips_gictimer_stop_count(MIPSGICTimerState *gic);
+MIPSGICTimerState *mips_gictimer_init(void *opaque, uint32_t nvps,
+                                      MIPSGICTimerCB *cb);
+
+#endif /* _MIPS_GICTIMER_H_ */