aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/include/asm/fsl_lbc.h2
-rw-r--r--arch/powerpc/include/asm/rio.h5
-rw-r--r--arch/powerpc/kernel/traps.c13
-rw-r--r--arch/powerpc/sysdev/fsl_lbc.c9
-rw-r--r--arch/powerpc/sysdev/fsl_rio.c100
5 files changed, 107 insertions, 22 deletions
diff --git a/arch/powerpc/include/asm/fsl_lbc.h b/arch/powerpc/include/asm/fsl_lbc.h
index 5c1bf3466749..8a0b5ece8f76 100644
--- a/arch/powerpc/include/asm/fsl_lbc.h
+++ b/arch/powerpc/include/asm/fsl_lbc.h
@@ -157,6 +157,8 @@ struct fsl_lbc_regs {
#define LBCR_EPAR_SHIFT 16
#define LBCR_BMT 0x0000FF00
#define LBCR_BMT_SHIFT 8
+#define LBCR_BMTPS 0x0000000F
+#define LBCR_BMTPS_SHIFT 0
#define LBCR_INIT 0x00040000
__be32 lcrr; /**< Clock Ratio Register */
#define LCRR_DBYP 0x80000000
diff --git a/arch/powerpc/include/asm/rio.h b/arch/powerpc/include/asm/rio.h
index 0018bf80cb25..d902abd33995 100644
--- a/arch/powerpc/include/asm/rio.h
+++ b/arch/powerpc/include/asm/rio.h
@@ -14,5 +14,10 @@
#define ASM_PPC_RIO_H
extern void platform_rio_init(void);
+#ifdef CONFIG_RAPIDIO
+extern int fsl_rio_mcheck_exception(struct pt_regs *);
+#else
+static inline int fsl_rio_mcheck_exception(struct pt_regs *regs) {return 0; }
+#endif
#endif /* ASM_PPC_RIO_H */
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index b13306b0d925..0ff4ab98d50c 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -55,6 +55,7 @@
#endif
#include <asm/kexec.h>
#include <asm/ppc-opcode.h>
+#include <asm/rio.h>
#if defined(CONFIG_DEBUGGER) || defined(CONFIG_KEXEC)
int (*__debugger)(struct pt_regs *regs) __read_mostly;
@@ -424,6 +425,12 @@ int machine_check_e500mc(struct pt_regs *regs)
unsigned long reason = mcsr;
int recoverable = 1;
+ if (reason & MCSR_BUS_RBERR) {
+ recoverable = fsl_rio_mcheck_exception(regs);
+ if (recoverable == 1)
+ goto silent_out;
+ }
+
printk("Machine check in kernel mode.\n");
printk("Caused by (from MCSR=%lx): ", reason);
@@ -499,6 +506,7 @@ int machine_check_e500mc(struct pt_regs *regs)
reason & MCSR_MEA ? "Effective" : "Physical", addr);
}
+silent_out:
mtspr(SPRN_MCSR, mcsr);
return mfspr(SPRN_MCSR) == 0 && recoverable;
}
@@ -507,6 +515,11 @@ int machine_check_e500(struct pt_regs *regs)
{
unsigned long reason = get_mc_reason(regs);
+ if (reason & MCSR_BUS_RBERR) {
+ if (fsl_rio_mcheck_exception(regs))
+ return 1;
+ }
+
printk("Machine check in kernel mode.\n");
printk("Caused by (from MCSR=%lx): ", reason);
diff --git a/arch/powerpc/sysdev/fsl_lbc.c b/arch/powerpc/sysdev/fsl_lbc.c
index 4fcb5a4e60dd..0608b1657da4 100644
--- a/arch/powerpc/sysdev/fsl_lbc.c
+++ b/arch/powerpc/sysdev/fsl_lbc.c
@@ -184,7 +184,8 @@ int fsl_upm_run_pattern(struct fsl_upm *upm, void __iomem *io_base, u32 mar)
}
EXPORT_SYMBOL(fsl_upm_run_pattern);
-static int __devinit fsl_lbc_ctrl_init(struct fsl_lbc_ctrl *ctrl)
+static int __devinit fsl_lbc_ctrl_init(struct fsl_lbc_ctrl *ctrl,
+ struct device_node *node)
{
struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
@@ -198,6 +199,10 @@ static int __devinit fsl_lbc_ctrl_init(struct fsl_lbc_ctrl *ctrl)
/* Enable interrupts for any detected events */
out_be32(&lbc->lteir, LTEIR_ENABLE);
+ /* Set the monitor timeout value to the maximum for erratum A001 */
+ if (of_device_is_compatible(node, "fsl,elbc"))
+ clrsetbits_be32(&lbc->lbcr, LBCR_BMT, LBCR_BMTPS);
+
return 0;
}
@@ -304,7 +309,7 @@ static int __devinit fsl_lbc_ctrl_probe(struct platform_device *dev)
fsl_lbc_ctrl_dev->dev = &dev->dev;
- ret = fsl_lbc_ctrl_init(fsl_lbc_ctrl_dev);
+ ret = fsl_lbc_ctrl_init(fsl_lbc_ctrl_dev, dev->dev.of_node);
if (ret < 0)
goto err;
diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c
index 49798532b477..5b206a2fe17c 100644
--- a/arch/powerpc/sysdev/fsl_rio.c
+++ b/arch/powerpc/sysdev/fsl_rio.c
@@ -10,7 +10,7 @@
* - Added Port-Write message handling
* - Added Machine Check exception handling
*
- * Copyright (C) 2007, 2008 Freescale Semiconductor, Inc.
+ * Copyright (C) 2007, 2008, 2010 Freescale Semiconductor, Inc.
* Zhang Wei <wei.zhang@freescale.com>
*
* Copyright 2005 MontaVista Software, Inc.
@@ -47,15 +47,33 @@
#define IRQ_RIO_RX(m) (((struct rio_priv *)(m->priv))->rxirq)
#define IRQ_RIO_PW(m) (((struct rio_priv *)(m->priv))->pwirq)
+#define IPWSR_CLEAR 0x98
+#define OMSR_CLEAR 0x1cb3
+#define IMSR_CLEAR 0x491
+#define IDSR_CLEAR 0x91
+#define ODSR_CLEAR 0x1c00
+#define LTLEECSR_ENABLE_ALL 0xFFC000FC
+#define ESCSR_CLEAR 0x07120204
+
+#define RIO_PORT1_EDCSR 0x0640
+#define RIO_PORT2_EDCSR 0x0680
+#define RIO_PORT1_IECSR 0x10130
+#define RIO_PORT2_IECSR 0x101B0
+#define RIO_IM0SR 0x13064
+#define RIO_IM1SR 0x13164
+#define RIO_OM0SR 0x13004
+#define RIO_OM1SR 0x13104
+
#define RIO_ATMU_REGS_OFFSET 0x10c00
#define RIO_P_MSG_REGS_OFFSET 0x11000
#define RIO_S_MSG_REGS_OFFSET 0x13000
#define RIO_GCCSR 0x13c
#define RIO_ESCSR 0x158
+#define RIO_PORT2_ESCSR 0x178
#define RIO_CCSR 0x15c
#define RIO_LTLEDCSR 0x0608
-#define RIO_LTLEDCSR_IER 0x80000000
-#define RIO_LTLEDCSR_PRT 0x01000000
+#define RIO_LTLEDCSR_IER 0x80000000
+#define RIO_LTLEDCSR_PRT 0x01000000
#define RIO_LTLEECSR 0x060c
#define RIO_EPWISR 0x10010
#define RIO_ISR_AACR 0x10120
@@ -88,7 +106,10 @@
#define RIO_IPWSR_PWD 0x00000008
#define RIO_IPWSR_PWB 0x00000004
-#define RIO_EPWISR_PINT 0x80000000
+/* EPWISR Error match value */
+#define RIO_EPWISR_PINT1 0x80000000
+#define RIO_EPWISR_PINT2 0x40000000
+#define RIO_EPWISR_MU 0x00000002
#define RIO_EPWISR_PW 0x00000001
#define RIO_MSG_DESC_SIZE 32
@@ -260,9 +281,7 @@ struct rio_priv {
static void __iomem *rio_regs_win;
#ifdef CONFIG_E500
-static int (*saved_mcheck_exception)(struct pt_regs *regs);
-
-static int fsl_rio_mcheck_exception(struct pt_regs *regs)
+int fsl_rio_mcheck_exception(struct pt_regs *regs)
{
const struct exception_table_entry *entry = NULL;
unsigned long reason = mfspr(SPRN_MCSR);
@@ -284,11 +303,9 @@ static int fsl_rio_mcheck_exception(struct pt_regs *regs)
}
}
- if (saved_mcheck_exception)
- return saved_mcheck_exception(regs);
- else
- return cur_cpu_spec->machine_check(regs);
+ return 0;
}
+EXPORT_SYMBOL_GPL(fsl_rio_mcheck_exception);
#endif
/**
@@ -1064,6 +1081,40 @@ static int fsl_rio_doorbell_init(struct rio_mport *mport)
return rc;
}
+static void port_error_handler(struct rio_mport *port, int offset)
+{
+ /*XXX: Error recovery is not implemented, we just clear errors */
+ out_be32((u32 *)(rio_regs_win + RIO_LTLEDCSR), 0);
+
+ if (offset == 0) {
+ out_be32((u32 *)(rio_regs_win + RIO_PORT1_EDCSR), 0);
+ out_be32((u32 *)(rio_regs_win + RIO_PORT1_IECSR), 0);
+ out_be32((u32 *)(rio_regs_win + RIO_ESCSR), ESCSR_CLEAR);
+ } else {
+ out_be32((u32 *)(rio_regs_win + RIO_PORT2_EDCSR), 0);
+ out_be32((u32 *)(rio_regs_win + RIO_PORT2_IECSR), 0);
+ out_be32((u32 *)(rio_regs_win + RIO_PORT2_ESCSR), ESCSR_CLEAR);
+ }
+}
+
+static void msg_unit_error_handler(struct rio_mport *port)
+{
+ struct rio_priv *priv = port->priv;
+
+ /*XXX: Error recovery is not implemented, we just clear errors */
+ out_be32((u32 *)(rio_regs_win + RIO_LTLEDCSR), 0);
+
+ out_be32((u32 *)(rio_regs_win + RIO_IM0SR), IMSR_CLEAR);
+ out_be32((u32 *)(rio_regs_win + RIO_IM1SR), IMSR_CLEAR);
+ out_be32((u32 *)(rio_regs_win + RIO_OM0SR), OMSR_CLEAR);
+ out_be32((u32 *)(rio_regs_win + RIO_OM1SR), OMSR_CLEAR);
+
+ out_be32(&priv->msg_regs->odsr, ODSR_CLEAR);
+ out_be32(&priv->msg_regs->dsr, IDSR_CLEAR);
+
+ out_be32(&priv->msg_regs->pwsr, IPWSR_CLEAR);
+}
+
/**
* fsl_rio_port_write_handler - MPC85xx port write interrupt handler
* @irq: Linux interrupt number
@@ -1144,10 +1195,22 @@ fsl_rio_port_write_handler(int irq, void *dev_instance)
}
pw_done:
- if (epwisr & RIO_EPWISR_PINT) {
+ if (epwisr & RIO_EPWISR_PINT1) {
+ tmp = in_be32(priv->regs_win + RIO_LTLEDCSR);
+ pr_debug("RIO_LTLEDCSR = 0x%x\n", tmp);
+ port_error_handler(port, 0);
+ }
+
+ if (epwisr & RIO_EPWISR_PINT2) {
tmp = in_be32(priv->regs_win + RIO_LTLEDCSR);
pr_debug("RIO_LTLEDCSR = 0x%x\n", tmp);
- out_be32(priv->regs_win + RIO_LTLEDCSR, 0);
+ port_error_handler(port, 1);
+ }
+
+ if (epwisr & RIO_EPWISR_MU) {
+ tmp = in_be32(priv->regs_win + RIO_LTLEDCSR);
+ pr_debug("RIO_LTLEDCSR = 0x%x\n", tmp);
+ msg_unit_error_handler(port);
}
return IRQ_HANDLED;
@@ -1258,12 +1321,14 @@ static int fsl_rio_port_write_init(struct rio_mport *mport)
/* Hook up port-write handler */
- rc = request_irq(IRQ_RIO_PW(mport), fsl_rio_port_write_handler, 0,
- "port-write", (void *)mport);
+ rc = request_irq(IRQ_RIO_PW(mport), fsl_rio_port_write_handler,
+ IRQF_SHARED, "port-write", (void *)mport);
if (rc < 0) {
pr_err("MPC85xx RIO: unable to request inbound doorbell irq");
goto err_out;
}
+ /* Enable Error Interrupt */
+ out_be32((u32 *)(rio_regs_win + RIO_LTLEECSR), LTLEECSR_ENABLE_ALL);
INIT_WORK(&priv->pw_work, fsl_pw_dpc);
spin_lock_init(&priv->pw_fifo_lock);
@@ -1538,11 +1603,6 @@ int fsl_rio_setup(struct platform_device *dev)
fsl_rio_doorbell_init(port);
fsl_rio_port_write_init(port);
-#ifdef CONFIG_E500
- saved_mcheck_exception = ppc_md.machine_check_exception;
- ppc_md.machine_check_exception = fsl_rio_mcheck_exception;
-#endif
-
return 0;
err:
iounmap(priv->regs_win);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-01 18:51:27 +0000