hw/intc: Add LoongArch ls7a interrupt controller support(PCH-PIC)

This patch realize the PCH-PIC interrupt controller.

Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220606124333.2060567-33-yangxiaojuan@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

include/hw/intc/loongarch_pch_pic.h

@@ -0,0 +1,69 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * LoongArch 7A1000 I/O interrupt controller definitions
+ *
+ * Copyright (c) 2021 Loongson Technology Corporation Limited
+ */
+
+#define TYPE_LOONGARCH_PCH_PIC "loongarch_pch_pic"
+#define PCH_PIC_NAME(name) TYPE_LOONGARCH_PCH_PIC#name
+OBJECT_DECLARE_SIMPLE_TYPE(LoongArchPCHPIC, LOONGARCH_PCH_PIC)
+
+#define PCH_PIC_IRQ_START               0
+#define PCH_PIC_IRQ_END                 63
+#define PCH_PIC_IRQ_NUM                 64
+#define PCH_PIC_INT_ID_VAL              0x7000000UL
+#define PCH_PIC_INT_ID_NUM              0x3f0001UL
+
+#define PCH_PIC_INT_ID_LO               0x00
+#define PCH_PIC_INT_ID_HI               0x04
+#define PCH_PIC_INT_MASK_LO             0x20
+#define PCH_PIC_INT_MASK_HI             0x24
+#define PCH_PIC_HTMSI_EN_LO             0x40
+#define PCH_PIC_HTMSI_EN_HI             0x44
+#define PCH_PIC_INT_EDGE_LO             0x60
+#define PCH_PIC_INT_EDGE_HI             0x64
+#define PCH_PIC_INT_CLEAR_LO            0x80
+#define PCH_PIC_INT_CLEAR_HI            0x84
+#define PCH_PIC_AUTO_CTRL0_LO           0xc0
+#define PCH_PIC_AUTO_CTRL0_HI           0xc4
+#define PCH_PIC_AUTO_CTRL1_LO           0xe0
+#define PCH_PIC_AUTO_CTRL1_HI           0xe4
+#define PCH_PIC_ROUTE_ENTRY_OFFSET      0x100
+#define PCH_PIC_ROUTE_ENTRY_END         0x13f
+#define PCH_PIC_HTMSI_VEC_OFFSET        0x200
+#define PCH_PIC_HTMSI_VEC_END           0x23f
+#define PCH_PIC_INT_STATUS_LO           0x3a0
+#define PCH_PIC_INT_STATUS_HI           0x3a4
+#define PCH_PIC_INT_POL_LO              0x3e0
+#define PCH_PIC_INT_POL_HI              0x3e4
+
+#define STATUS_LO_START                 0
+#define STATUS_HI_START                 0x4
+#define POL_LO_START                    0x40
+#define POL_HI_START                    0x44
+struct LoongArchPCHPIC {
+    SysBusDevice parent_obj;
+    qemu_irq parent_irq[64];
+    uint64_t int_mask; /*0x020 interrupt mask register*/
+    uint64_t htmsi_en; /*0x040 1=msi*/
+    uint64_t intedge; /*0x060 edge=1 level  =0*/
+    uint64_t intclr; /*0x080 for clean edge int,set 1 clean,set 0 is noused*/
+    uint64_t auto_crtl0; /*0x0c0*/
+    uint64_t auto_crtl1; /*0x0e0*/
+    uint64_t last_intirr;    /* edge detection */
+    uint64_t intirr; /* 0x380 interrupt request register */
+    uint64_t intisr; /* 0x3a0 interrupt service register */
+    /*
+     * 0x3e0 interrupt level polarity selection
+     * register 0 for high level trigger
+     */
+    uint64_t int_polarity;
+
+    uint8_t route_entry[64]; /*0x100 - 0x138*/
+    uint8_t htmsi_vector[64]; /*0x200 - 0x238*/
+
+    MemoryRegion iomem32_low;
+    MemoryRegion iomem32_high;
+    MemoryRegion iomem8;
+};

include/hw/pci-host/ls7a.h

@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * QEMU LoongArch CPU
+ *
+ * Copyright (c) 2021 Loongson Technology Corporation Limited
+ */
+
+#ifndef HW_LS7A_H
+#define HW_LS7A_H
+
+#include "hw/pci/pci.h"
+#include "hw/pci/pcie_host.h"
+#include "hw/pci-host/pam.h"
+#include "qemu/units.h"
+#include "qemu/range.h"
+#include "qom/object.h"
+
+#define LS7A_PCH_REG_BASE       0x10000000UL
+#define LS7A_IOAPIC_REG_BASE    (LS7A_PCH_REG_BASE)
+#define LS7A_PCH_MSI_ADDR_LOW   0x2FF00000UL
+
+/*
+ * According to the kernel pch irq start from 64 offset
+ * 0 ~ 16 irqs used for non-pci device while 16 ~ 64 irqs
+ * used for pci device.
+ */
+#define PCH_PIC_IRQ_OFFSET      64
+#define LS7A_DEVICE_IRQS        16
+#define LS7A_PCI_IRQS           48
+#endif