---

yaml
---
r: 64460
b: refs/heads/master
c: 3addf55
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: fa7f374bbf6d8e5fc7dd281a62498041066aaf43
+refs/heads/master: 3addf55c9415f9da039947b33d064332137e49fe

trunk/arch/powerpc/platforms/cell/cbe_regs.h

@@ -113,10 +113,14 @@ struct cbe_pmd_regs {
 	u64	checkstop_fir;					/* 0x0c00 */
 	u64	recoverable_fir;				/* 0x0c08 */
 	u64	spec_att_mchk_fir;				/* 0x0c10 */
-	u64	fir_mode_reg;					/* 0x0c18 */
+	u32	fir_mode_reg;					/* 0x0c18 */
+	u8	pad_0x0c1c_0x0c20 [4];				/* 0x0c1c */
+#define CBE_PMD_FIR_MODE_M8		0x00800
 	u64	fir_enable_mask;				/* 0x0c20 */
 
-	u8	pad_0x0c28_0x1000 [0x1000 - 0x0c28];		/* 0x0c28 */
+	u8	pad_0x0c28_0x0ca8 [0x0ca8 - 0x0c28];		/* 0x0c28 */
+	u64	ras_esc_0;					/* 0x0ca8 */
+	u8	pad_0x0cb0_0x1000 [0x1000 - 0x0cb0];		/* 0x0cb0 */
 };
 
 extern struct cbe_pmd_regs __iomem *cbe_get_pmd_regs(struct device_node *np);

trunk/arch/powerpc/platforms/cell/pervasive.c

@@ -38,6 +38,8 @@
 #include "pervasive.h"
 #include "cbe_regs.h"
 
+static int sysreset_hack;
+
 static void cbe_power_save(void)
 {
 	unsigned long ctrl, thread_switch_control;
@@ -85,6 +87,9 @@ static void cbe_power_save(void)
 
 static int cbe_system_reset_exception(struct pt_regs *regs)
 {
+	int cpu;
+	struct cbe_pmd_regs __iomem *pmd;
+
 	switch (regs->msr & SRR1_WAKEMASK) {
 	case SRR1_WAKEEE:
 		do_IRQ(regs);
@@ -93,6 +98,18 @@ static int cbe_system_reset_exception(struct pt_regs *regs)
 		timer_interrupt(regs);
 		break;
 	case SRR1_WAKEMT:
+		/*
+		 * The BMC can inject user triggered system reset exceptions,
+		 * but cannot set the system reset reason in srr1,
+		 * so check an extra register here.
+		 */
+		if (sysreset_hack && (cpu = smp_processor_id()) == 0) {
+			pmd = cbe_get_cpu_pmd_regs(cpu);
+			if (in_be64(&pmd->ras_esc_0) & 0xffff) {
+				out_be64(&pmd->ras_esc_0, 0);
+				return 0;
+			}
+		}
 		break;
 #ifdef CONFIG_CBE_RAS
 	case SRR1_WAKESYSERR:
@@ -113,9 +130,12 @@ static int cbe_system_reset_exception(struct pt_regs *regs)
 void __init cbe_pervasive_init(void)
 {
 	int cpu;
+
 	if (!cpu_has_feature(CPU_FTR_PAUSE_ZERO))
 		return;
 
+	sysreset_hack = machine_is_compatible("IBM,CBPLUS-1.0");
+
 	for_each_possible_cpu(cpu) {
 		struct cbe_pmd_regs __iomem *regs = cbe_get_cpu_pmd_regs(cpu);
 		if (!regs)
@@ -124,6 +144,12 @@ void __init cbe_pervasive_init(void)
 		 /* Enable Pause(0) control bit */
 		out_be64(&regs->pmcr, in_be64(&regs->pmcr) |
 					    CBE_PMD_PAUSE_ZERO_CONTROL);
+
+		/* Enable JTAG system-reset hack */
+		if (sysreset_hack)
+			out_be32(&regs->fir_mode_reg,
+				in_be32(&regs->fir_mode_reg) |
+				CBE_PMD_FIR_MODE_M8);
 	}
 
 	ppc_md.power_save = cbe_power_save;