target/ppc: IBM PPE42 exception flags and regs

Introduces flags and register definitions needed
for the IBM PPE42 exception model.

Signed-off-by: Glenn Miles <milesg@linux.ibm.com>
Reviewed-by: Chinmay Rath <rathc@linux.ibm.com>
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Link: https://lore.kernel.org/r/20250925201758.652077-4-milesg@linux.ibm.com
Message-ID: <20250925201758.652077-4-milesg@linux.ibm.com>

diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
index 8e13ce41a96c88ba804d1d2e53abac211b348476..787020f6f90cbf2a14c2f822c9e148b4ea23002a 100644 (file)
--- a/target/ppc/cpu.h
+++ b/target/ppc/cpu.h
@@ -220,6 +220,8 @@ typedef enum powerpc_excp_t {
     POWERPC_EXCP_POWER10,
     /* POWER11 exception model           */
     POWERPC_EXCP_POWER11,
+    /* PPE42 exception model            */
+    POWERPC_EXCP_PPE42,
 } powerpc_excp_t;
 
 /*****************************************************************************/
@@ -760,6 +762,31 @@ FIELD(MSR, SIBRCA, MSR_SIBRCA7, 8)
 #define ESR_VLEMI PPC_BIT(58) /* VLE operation                          */
 #define ESR_MIF   PPC_BIT(62) /* Misaligned instruction (VLE)           */
 
+/* PPE42 Interrupt Status Register bits */
+#define PPE42_ISR_SRSMS0  PPC_BIT_NR(48) /* Sys Reset State Machine State 0   */
+#define PPE42_ISR_SRSMS1  PPC_BIT_NR(49) /* Sys Reset State Machine State 1   */
+#define PPE42_ISR_SRSMS2  PPC_BIT_NR(50) /* Sys Reset State Machine State 2   */
+#define PPE42_ISR_SRSMS3  PPC_BIT_NR(51) /* Sys Reset State Machine State 3   */
+#define PPE42_ISR_EP      PPC_BIT_NR(53) /* MSR[EE] Maskable Event Pending    */
+#define PPE42_ISR_PTR     PPC_BIT_NR(56) /* Program Interrupt from trap       */
+#define PPE42_ISR_ST      PPC_BIT_NR(57) /* Data Interrupt caused by store    */
+#define PPE42_ISR_MFE     PPC_BIT_NR(60) /* Multiple Fault Error              */
+#define PPE42_ISR_MCS0    PPC_BIT_NR(61) /* Machine Check Status bit0         */
+#define PPE42_ISR_MCS1    PPC_BIT_NR(62) /* Machine Check Status bit1         */
+#define PPE42_ISR_MCS2    PPC_BIT_NR(63) /* Machine Check Status bit2         */
+FIELD(PPE42_ISR, SRSMS, PPE42_ISR_SRSMS3, 4)
+FIELD(PPE42_ISR, MCS, PPE42_ISR_MCS2, 3)
+
+/* PPE42 Machine Check Status field values */
+#define PPE42_ISR_MCS_INSTRUCTION             0
+#define PPE42_ISR_MCS_DATA_LOAD               1
+#define PPE42_ISR_MCS_DATA_PRECISE_STORE      2
+#define PPE42_ISR_MCS_DATA_IMPRECISE_STORE    3
+#define PPE42_ISR_MCS_PROGRAM                 4
+#define PPE42_ISR_MCS_ISI                     5
+#define PPE42_ISR_MCS_ALIGNMENT               6
+#define PPE42_ISR_MCS_DSI                     7
+
 /* Transaction EXception And Summary Register bits                           */
 #define TEXASR_FAILURE_PERSISTENT                (63 - 7)
 #define TEXASR_DISALLOWED                        (63 - 8)