[PATCH 1/9] RISC-V: Add AIA related CSR defines

Anup Patel
2022-11-11T04:43:03Z

The RISC-V AIA specification improves handling per-HART local interrupts
in a backward compatible manner. This patch adds defines for new RISC-V
AIA CSRs.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
---
arch/riscv/include/asm/csr.h | 92 ++++++++++++++++++++++++++++++++++++
1 file changed, 92 insertions(+)

diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h
index 0e571f6483d9..4e1356bad7b2 100644
--- a/arch/riscv/include/asm/csr.h
+++ b/arch/riscv/include/asm/csr.h
@@ -73,7 +73,10 @@
#define IRQ_S_EXT 9
#define IRQ_VS_EXT 10
#define IRQ_M_EXT 11
+#define IRQ_S_GEXT 12
#define IRQ_PMU_OVF 13
+#define IRQ_LOCAL_MAX (IRQ_PMU_OVF + 1)
+#define IRQ_LOCAL_MASK ((_AC(1, UL) << IRQ_LOCAL_MAX) - 1)

/* Exception causes */
#define EXC_INST_MISALIGNED 0
@@ -156,6 +159,26 @@
(_AC(1, UL) << IRQ_S_TIMER) | \
(_AC(1, UL) << IRQ_S_EXT))

+/* AIA CSR bits */
+#define TOPI_IID_SHIFT 16
+#define TOPI_IID_MASK 0xfff
+#define TOPI_IPRIO_MASK 0xff
+#define TOPI_IPRIO_BITS 8
+
+#define TOPEI_ID_SHIFT 16
+#define TOPEI_ID_MASK 0x7ff
+#define TOPEI_PRIO_MASK 0x7ff
+
+#define ISELECT_IPRIO0 0x30
+#define ISELECT_IPRIO15 0x3f
+#define ISELECT_MASK 0x1ff
+
+#define HVICTL_VTI 0x40000000
+#define HVICTL_IID 0x0fff0000
+#define HVICTL_IID_SHIFT 16
+#define HVICTL_IPRIOM 0x00000100
+#define HVICTL_IPRIO 0x000000ff
+
/* xENVCFG flags */
#define ENVCFG_STCE (_AC(1, ULL) << 63)
#define ENVCFG_PBMTE (_AC(1, ULL) << 62)
@@ -250,6 +273,18 @@
#define CSR_STIMECMP 0x14D
#define CSR_STIMECMPH 0x15D

+/* Supervisor-Level Window to Indirectly Accessed Registers (AIA) */
+#define CSR_SISELECT 0x150
+#define CSR_SIREG 0x151
+
+/* Supervisor-Level Interrupts (AIA) */
+#define CSR_STOPEI 0x15c
+#define CSR_STOPI 0xdb0
+
+/* Supervisor-Level High-Half CSRs (AIA) */
+#define CSR_SIEH 0x114
+#define CSR_SIPH 0x154
+
#define CSR_VSSTATUS 0x200
#define CSR_VSIE 0x204
#define CSR_VSTVEC 0x205
@@ -279,8 +314,32 @@
#define CSR_HGATP 0x680
#define CSR_HGEIP 0xe12

+/* 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_VSTOPEI 0x25c
+#define CSR_VSTOPI 0xeb0
+
+/* 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
+
#define CSR_MSTATUS 0x300
#define CSR_MISA 0x301
+#define CSR_MIDELEG 0x303
#define CSR_MIE 0x304
#define CSR_MTVEC 0x305
#define CSR_MENVCFG 0x30a
@@ -297,6 +356,25 @@
#define CSR_MIMPID 0xf13
#define CSR_MHARTID 0xf14

+/* Machine-Level Window to Indirectly Accessed Registers (AIA) */
+#define CSR_MISELECT 0x350
+#define CSR_MIREG 0x351
+
+/* Machine-Level Interrupts (AIA) */
+#define CSR_MTOPEI 0x35c
+#define CSR_MTOPI 0xfb0
+
+/* 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
+
#ifdef CONFIG_RISCV_M_MODE
# define CSR_STATUS CSR_MSTATUS
# define CSR_IE CSR_MIE
@@ -307,6 +385,13 @@
# define CSR_TVAL CSR_MTVAL
# define CSR_IP CSR_MIP

+# define CSR_IEH CSR_MIEH
+# define CSR_ISELECT CSR_MISELECT
+# define CSR_IREG CSR_MIREG
+# define CSR_IPH CSR_MIPH
+# define CSR_TOPEI CSR_MTOPEI
+# define CSR_TOPI CSR_MTOPI
+
# define SR_IE SR_MIE
# define SR_PIE SR_MPIE
# define SR_PP SR_MPP
@@ -324,6 +409,13 @@
# define CSR_TVAL CSR_STVAL
# define CSR_IP CSR_SIP

+# define CSR_IEH CSR_SIEH
+# define CSR_ISELECT CSR_SISELECT
+# define CSR_IREG CSR_SIREG
+# define CSR_IPH CSR_SIPH
+# define CSR_TOPEI CSR_STOPEI
+# define CSR_TOPI CSR_STOPI
+
# define SR_IE SR_SIE
# define SR_PIE SR_SPIE
# define SR_PP SR_SPP
--
2.34.1