target/riscv: Add defines for AIA CSRs

The RISC-V AIA specification extends RISC-V local interrupts and
introduces new CSRs. This patch adds defines for the new AIA CSRs.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Message-id: 20220204174700.534953-8-anup@brainfault.org
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

1 files changed, 119 insertions, 0 deletions

diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
index a541705..068c4d8 100644
--- a/target/riscv/cpu_bits.h
+++ b/target/riscv/cpu_bits.h
@@ -168,6 +168,31 @@
 #define CSR_MTVAL           0x343
 #define CSR_MIP             0x344
 
+/* Machine-Level Window to Indirectly Accessed Registers (AIA) */
+#define CSR_MISELECT        0x350
+#define CSR_MIREG           0x351
+
+/* Machine-Level Interrupts (AIA) */
+#define CSR_MTOPI           0xfb0
+
+/* Machine-Level IMSIC Interface (AIA) */
+#define CSR_MSETEIPNUM      0x358
+#define CSR_MCLREIPNUM      0x359
+#define CSR_MSETEIENUM      0x35a
+#define CSR_MCLREIENUM      0x35b
+#define CSR_MTOPEI          0x35c
+
+/* Virtual Interrupts for Supervisor Level (AIA) */
+#define CSR_MVIEN           0x308
+#define CSR_MVIP            0x309
+
+/* Machine-Level High-Half CSRs (AIA) */
+#define CSR_MIDELEGH        0x313
+#define CSR_MIEH            0x314
+#define CSR_MVIENH          0x318
+#define CSR_MVIPH           0x319
+#define CSR_MIPH            0x354
+
 /* Supervisor Trap Setup */
 #define CSR_SSTATUS         0x100
 #define CSR_SEDELEG         0x102
@@ -187,6 +212,24 @@
 #define CSR_SPTBR           0x180
 #define CSR_SATP            0x180
 
+/* Supervisor-Level Window to Indirectly Accessed Registers (AIA) */
+#define CSR_SISELECT        0x150
+#define CSR_SIREG           0x151
+
+/* Supervisor-Level Interrupts (AIA) */
+#define CSR_STOPI           0xdb0
+
+/* Supervisor-Level IMSIC Interface (AIA) */
+#define CSR_SSETEIPNUM      0x158
+#define CSR_SCLREIPNUM      0x159
+#define CSR_SSETEIENUM      0x15a
+#define CSR_SCLREIENUM      0x15b
+#define CSR_STOPEI          0x15c
+
+/* Supervisor-Level High-Half CSRs (AIA) */
+#define CSR_SIEH            0x114
+#define CSR_SIPH            0x154
+
 /* Hpervisor CSRs */
 #define CSR_HSTATUS         0x600
 #define CSR_HEDELEG         0x602
@@ -217,6 +260,35 @@
 #define CSR_MTINST          0x34a
 #define CSR_MTVAL2          0x34b
 
+/* Virtual Interrupts and Interrupt Priorities (H-extension with AIA) */
+#define CSR_HVIEN           0x608
+#define CSR_HVICTL          0x609
+#define CSR_HVIPRIO1        0x646
+#define CSR_HVIPRIO2        0x647
+
+/* VS-Level Window to Indirectly Accessed Registers (H-extension with AIA) */
+#define CSR_VSISELECT       0x250
+#define CSR_VSIREG          0x251
+
+/* VS-Level Interrupts (H-extension with AIA) */
+#define CSR_VSTOPI          0xeb0
+
+/* VS-Level IMSIC Interface (H-extension with AIA) */
+#define CSR_VSSETEIPNUM     0x258
+#define CSR_VSCLREIPNUM     0x259
+#define CSR_VSSETEIENUM     0x25a
+#define CSR_VSCLREIENUM     0x25b
+#define CSR_VSTOPEI         0x25c
+
+/* Hypervisor and VS-Level High-Half CSRs (H-extension with AIA) */
+#define CSR_HIDELEGH        0x613
+#define CSR_HVIENH          0x618
+#define CSR_HVIPH           0x655
+#define CSR_HVIPRIO1H       0x656
+#define CSR_HVIPRIO2H       0x657
+#define CSR_VSIEH           0x214
+#define CSR_VSIPH           0x254
+
 /* Enhanced Physical Memory Protection (ePMP) */
 #define CSR_MSECCFG         0x747
 #define CSR_MSECCFGH        0x757
@@ -635,4 +707,51 @@ typedef enum RISCVException {
 #define UMTE_U_PM_INSN      U_PM_INSN
 #define UMTE_MASK     (UMTE_U_PM_ENABLE | MMTE_U_PM_CURRENT | UMTE_U_PM_INSN)
 
+/* MISELECT, SISELECT, and VSISELECT bits (AIA) */
+#define ISELECT_IPRIO0                     0x30
+#define ISELECT_IPRIO15                    0x3f
+#define ISELECT_IMSIC_EIDELIVERY           0x70
+#define ISELECT_IMSIC_EITHRESHOLD          0x72
+#define ISELECT_IMSIC_EIP0                 0x80
+#define ISELECT_IMSIC_EIP63                0xbf
+#define ISELECT_IMSIC_EIE0                 0xc0
+#define ISELECT_IMSIC_EIE63                0xff
+#define ISELECT_IMSIC_FIRST                ISELECT_IMSIC_EIDELIVERY
+#define ISELECT_IMSIC_LAST                 ISELECT_IMSIC_EIE63
+#define ISELECT_MASK                       0x1ff
+
+/* Dummy [M|S|VS]ISELECT value for emulating [M|S|VS]TOPEI CSRs */
+#define ISELECT_IMSIC_TOPEI                (ISELECT_MASK + 1)
+
+/* IMSIC bits (AIA) */
+#define IMSIC_TOPEI_IID_SHIFT              16
+#define IMSIC_TOPEI_IID_MASK               0x7ff
+#define IMSIC_TOPEI_IPRIO_MASK             0x7ff
+#define IMSIC_EIPx_BITS                    32
+#define IMSIC_EIEx_BITS                    32
+
+/* MTOPI and STOPI bits (AIA) */
+#define TOPI_IID_SHIFT                     16
+#define TOPI_IID_MASK                      0xfff
+#define TOPI_IPRIO_MASK                    0xff
+
+/* Interrupt priority bits (AIA) */
+#define IPRIO_IRQ_BITS                     8
+#define IPRIO_MMAXIPRIO                    255
+#define IPRIO_DEFAULT_UPPER                4
+#define IPRIO_DEFAULT_MIDDLE               (IPRIO_DEFAULT_UPPER + 24)
+#define IPRIO_DEFAULT_M                    IPRIO_DEFAULT_MIDDLE
+#define IPRIO_DEFAULT_S                    (IPRIO_DEFAULT_M + 3)
+#define IPRIO_DEFAULT_SGEXT                (IPRIO_DEFAULT_S + 3)
+#define IPRIO_DEFAULT_VS                   (IPRIO_DEFAULT_SGEXT + 1)
+#define IPRIO_DEFAULT_LOWER                (IPRIO_DEFAULT_VS + 3)
+
+/* HVICTL bits (AIA) */
+#define HVICTL_VTI                         0x40000000
+#define HVICTL_IID                         0x0fff0000
+#define HVICTL_IPRIOM                      0x00000100
+#define HVICTL_IPRIO                       0x000000ff
+#define HVICTL_VALID_MASK                  \
+    (HVICTL_VTI | HVICTL_IID | HVICTL_IPRIOM | HVICTL_IPRIO)
+
 #endif