Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  [PATCH] powerpc: Use the ibm,pa-features property if available
  powerpc: Fix incorrect might_sleep in __get_user/__put_user on kernel addresses
  [PATCH] ppc32 CPM_UART: fixes and improvements
  [PATCH] ppc32 CPM_UART: Fixed break send on SCC
  [PATCH] powerpc/kprobes: fix singlestep out-of-line
  [PATCH] powerpc/pseries: avoid crash in PCI code if mem system not up

12 files changed, 209 insertions, 27 deletions

diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c
index 856ef1a832b9..f78866367b70 100644
--- a/arch/powerpc/kernel/kprobes.c
+++ b/arch/powerpc/kernel/kprobes.c
@@ -90,15 +90,15 @@ void __kprobes arch_remove_kprobe(struct kprobe *p)
 
 static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs)
 {
-        kprobe_opcode_t insn = *p->ainsn.insn;
-
         regs->msr |= MSR_SE;
 
-        /* single step inline if it is a trap variant */
-        if (is_trap(insn))
-                regs->nip = (unsigned long)p->addr;
-        else
-                regs->nip = (unsigned long)p->ainsn.insn;
+        /*
+         * On powerpc we should single step on the original
+         * instruction even if the probed insn is a trap
+         * variant as values in regs could play a part in
+         * if the trap is taken or not
+         */
+        regs->nip = (unsigned long)p->ainsn.insn;
 }
 
 static void __kprobes save_previous_kprobe(struct kprobe_ctlblk *kcb)
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 1cb69e8fb0b1..9a07f97f0712 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -885,6 +885,74 @@ void __init unflatten_device_tree(void)
         DBG(" <- unflatten_device_tree()\n");
 }
 
+/*
+ * ibm,pa-features is a per-cpu property that contains a string of
+ * attribute descriptors, each of which has a 2 byte header plus up
+ * to 254 bytes worth of processor attribute bits.  First header
+ * byte specifies the number of bytes following the header.
+ * Second header byte is an "attribute-specifier" type, of which
+ * zero is the only currently-defined value.
+ * Implementation:  Pass in the byte and bit offset for the feature
+ * that we are interested in.  The function will return -1 if the
+ * pa-features property is missing, or a 1/0 to indicate if the feature
+ * is supported/not supported.  Note that the bit numbers are
+ * big-endian to match the definition in PAPR.
+ */
+static struct ibm_pa_feature {
+        unsigned long   cpu_features;   /* CPU_FTR_xxx bit */
+        unsigned int    cpu_user_ftrs;  /* PPC_FEATURE_xxx bit */
+        unsigned char   pabyte;         /* byte number in ibm,pa-features */
+        unsigned char   pabit;          /* bit number (big-endian) */
+        unsigned char   invert;         /* if 1, pa bit set => clear feature */
+} ibm_pa_features[] __initdata = {
+        {0, PPC_FEATURE_HAS_MMU,        0, 0, 0},
+        {0, PPC_FEATURE_HAS_FPU,        0, 1, 0},
+        {CPU_FTR_SLB, 0,                0, 2, 0},
+        {CPU_FTR_CTRL, 0,               0, 3, 0},
+        {CPU_FTR_NOEXECUTE, 0,          0, 6, 0},
+        {CPU_FTR_NODSISRALIGN, 0,       1, 1, 1},
+        {CPU_FTR_CI_LARGE_PAGE, 0,      1, 2, 0},
+};
+
+static void __init check_cpu_pa_features(unsigned long node)
+{
+        unsigned char *pa_ftrs;
+        unsigned long len, tablelen, i, bit;
+
+        pa_ftrs = of_get_flat_dt_prop(node, "ibm,pa-features", &tablelen);
+        if (pa_ftrs == NULL)
+                return;
+
+        /* find descriptor with type == 0 */
+        for (;;) {
+                if (tablelen < 3)
+                        return;
+                len = 2 + pa_ftrs[0];
+                if (tablelen < len)
+                        return;         /* descriptor 0 not found */
+                if (pa_ftrs[1] == 0)
+                        break;
+                tablelen -= len;
+                pa_ftrs += len;
+        }
+
+        /* loop over bits we know about */
+        for (i = 0; i < ARRAY_SIZE(ibm_pa_features); ++i) {
+                struct ibm_pa_feature *fp = &ibm_pa_features[i];
+
+                if (fp->pabyte >= pa_ftrs[0])
+                        continue;
+                bit = (pa_ftrs[2 + fp->pabyte] >> (7 - fp->pabit)) & 1;
+                if (bit ^ fp->invert) {
+                        cur_cpu_spec->cpu_features |= fp->cpu_features;
+                        cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftrs;
+                } else {
+                        cur_cpu_spec->cpu_features &= ~fp->cpu_features;
+                        cur_cpu_spec->cpu_user_features &= ~fp->cpu_user_ftrs;
+                }
+        }
+}
+
 static int __init early_init_dt_scan_cpus(unsigned long node,
                                           const char *uname, int depth,
                                           void *data)
@@ -969,6 +1037,8 @@ static int __init early_init_dt_scan_cpus(unsigned long node,
         }
 #endif /* CONFIG_ALTIVEC */
 
+        check_cpu_pa_features(node);
+
 #ifdef CONFIG_PPC_PSERIES
         if (nthreads > 1)
                 cur_cpu_spec->cpu_features |= CPU_FTR_SMT;
diff --git a/arch/powerpc/platforms/pseries/eeh_event.c b/arch/powerpc/platforms/pseries/eeh_event.c
index a1bda6f96fd1..40020c65c89e 100644
--- a/arch/powerpc/platforms/pseries/eeh_event.c
+++ b/arch/powerpc/platforms/pseries/eeh_event.c
@@ -118,7 +118,15 @@ int eeh_send_failure_event (struct device_node *dn,
 {
         unsigned long flags;
         struct eeh_event *event;
+        char *location;
 
+        if (!mem_init_done) {
+                printk(KERN_ERR "EEH: event during early boot not handled\n");
+                location = (char *) get_property(dn, "ibm,loc-code", NULL);
+                printk(KERN_ERR "EEH: device node = %s\n", dn->full_name);
+                printk(KERN_ERR "EEH: PCI location = %s\n", location);
+                return 1;
+        }
         event = kmalloc(sizeof(*event), GFP_ATOMIC);
         if (event == NULL) {
                 printk (KERN_ERR "EEH: out of memory, event not handled\n");
diff --git a/arch/ppc/platforms/mpc866ads_setup.c b/arch/ppc/platforms/mpc866ads_setup.c
index 6ce3b842defe..d919dab61347 100644
--- a/arch/ppc/platforms/mpc866ads_setup.c
+++ b/arch/ppc/platforms/mpc866ads_setup.c
@@ -378,7 +378,7 @@ int __init mpc866ads_init(void)
         ppc_sys_device_setfunc(MPC8xx_CPM_SMC1, PPC_SYS_FUNC_UART);
 #endif
 
-#ifdef CONFIG_SERIAL_CPM_SMCer
+#ifdef CONFIG_SERIAL_CPM_SMC
         ppc_sys_device_enable(MPC8xx_CPM_SMC2);
         ppc_sys_device_setfunc(MPC8xx_CPM_SMC2, PPC_SYS_FUNC_UART);
 #endif
diff --git a/drivers/serial/cpm_uart/cpm_uart.h b/drivers/serial/cpm_uart/cpm_uart.h
index aa5eb7ddeda9..3b35cb779539 100644
--- a/drivers/serial/cpm_uart/cpm_uart.h
+++ b/drivers/serial/cpm_uart/cpm_uart.h
@@ -5,6 +5,13 @@
  *
  *  Copyright (C) 2004 Freescale Semiconductor, Inc.
  *
+ *  2006 (c) MontaVista Software, Inc.
+ *      Vitaly Bordug <vbordug@ru.mvista.com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ *
  */
 #ifndef CPM_UART_H
 #define CPM_UART_H
@@ -101,12 +108,13 @@ static inline unsigned long cpu2cpm_addr(void* addr, struct uart_cpm_port *pinfo
         int offset;
         u32 val = (u32)addr;
         /* sane check */
-        if ((val >= (u32)pinfo->mem_addr) &&
+        if (likely((val >= (u32)pinfo->mem_addr)) &&
                         (val<((u32)pinfo->mem_addr + pinfo->mem_size))) {
                 offset = val - (u32)pinfo->mem_addr;
                 return pinfo->dma_addr+offset;
         }
-        printk("%s(): address %x to translate out of range!\n", __FUNCTION__, val);
+        /* something nasty happened */
+        BUG();
         return 0;
 }
 
@@ -115,12 +123,13 @@ static inline void *cpm2cpu_addr(unsigned long addr, struct uart_cpm_port *pinfo
         int offset;
         u32 val = addr;
         /* sane check */
-        if ((val >= pinfo->dma_addr) &&
-                        (val<(pinfo->dma_addr + pinfo->mem_size))) {
+        if (likely((val >= pinfo->dma_addr) &&
+                        (val<(pinfo->dma_addr + pinfo->mem_size)))) {
                 offset = val - (u32)pinfo->dma_addr;
                 return (void*)(pinfo->mem_addr+offset);
         }
-        printk("%s(): address %x to translate out of range!\n", __FUNCTION__, val);
+        /* something nasty happened */
+        BUG();
         return 0;
 }
 
diff --git a/drivers/serial/cpm_uart/cpm_uart_core.c b/drivers/serial/cpm_uart/cpm_uart_core.c
index ced193bf9e1e..969f94900431 100644
--- a/drivers/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/serial/cpm_uart/cpm_uart_core.c
@@ -12,7 +12,8 @@
  *
  *  Copyright (C) 2004 Freescale Semiconductor, Inc.
  *            (C) 2004 Intracom, S.A.
- *            (C) 2005 MontaVista Software, Inc. by Vitaly Bordug <vbordug@ru.mvista.com>
+ *            (C) 2005-2006 MontaVista Software, Inc.
+ *              Vitaly Bordug <vbordug@ru.mvista.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -81,7 +82,7 @@ early_uart_get_pdev(int index)
 }
 
 
-void cpm_uart_count(void)
+static void cpm_uart_count(void)
 {
         cpm_uart_nr = 0;
 #ifdef CONFIG_SERIAL_CPM_SMC1
@@ -104,6 +105,21 @@ void cpm_uart_count(void)
 #endif
 }
 
+/* Get UART number by its id */
+static int cpm_uart_id2nr(int id)
+{
+        int i;
+        if (id < UART_NR) {
+                for (i=0; i<UART_NR; i++) {
+                        if (cpm_uart_port_map[i] == id)
+                                return i;
+                }
+        }
+
+        /* not found or invalid argument */
+        return -1;
+}
+
 /*
  * Check, if transmit buffers are processed
 */
@@ -457,7 +473,11 @@ static void cpm_uart_shutdown(struct uart_port *port)
                 }
 
                 /* Shut them really down and reinit buffer descriptors */
-                cpm_line_cr_cmd(line, CPM_CR_STOP_TX);
+                if (IS_SMC(pinfo))
+                        cpm_line_cr_cmd(line, CPM_CR_STOP_TX);
+                else
+                        cpm_line_cr_cmd(line, CPM_CR_GRA_STOP_TX);
+
                 cpm_uart_initbd(pinfo);
         }
 }
@@ -1008,7 +1028,11 @@ int cpm_uart_drv_get_platform_data(struct platform_device *pdev, int is_con)
         int line;
         u32 mem, pram;
 
-        for (line=0; line<UART_NR && cpm_uart_port_map[line]!=pdata->fs_no; line++);
+        line = cpm_uart_id2nr(idx);
+        if(line < 0) {
+                printk(KERN_ERR"%s(): port %d is not registered", __FUNCTION__, idx);
+                return -1;
+        }
 
         pinfo = (struct uart_cpm_port *) &cpm_uart_ports[idx];
 
@@ -1241,8 +1265,7 @@ static int cpm_uart_drv_probe(struct device *dev)
         }
 
         pdata = pdev->dev.platform_data;
-        pr_debug("cpm_uart_drv_probe: Adding CPM UART %d\n",
-                        cpm_uart_port_map[pdata->fs_no]);
+        pr_debug("cpm_uart_drv_probe: Adding CPM UART %d\n", cpm_uart_id2nr(pdata->fs_no));
 
         if ((ret = cpm_uart_drv_get_platform_data(pdev, 0)))
                 return ret;
@@ -1261,7 +1284,7 @@ static int cpm_uart_drv_remove(struct device *dev)
         struct fs_uart_platform_info *pdata = pdev->dev.platform_data;
 
         pr_debug("cpm_uart_drv_remove: Removing CPM UART %d\n",
-                        cpm_uart_port_map[pdata->fs_no]);
+                        cpm_uart_id2nr(pdata->fs_no));
 
         uart_remove_one_port(&cpm_reg, &cpm_uart_ports[pdata->fs_no].port);
         return 0;
diff --git a/drivers/serial/cpm_uart/cpm_uart_cpm1.c b/drivers/serial/cpm_uart/cpm_uart_cpm1.c
index a5a30622637a..17406a05ce1f 100644
--- a/drivers/serial/cpm_uart/cpm_uart_cpm1.c
+++ b/drivers/serial/cpm_uart/cpm_uart_cpm1.c
@@ -8,6 +8,8 @@
  *
  *  Copyright (C) 2004 Freescale Semiconductor, Inc.
  *            (C) 2004 Intracom, S.A.
+ *            (C) 2006 MontaVista Software, Inc.
+ *              Vitaly Bordug <vbordug@ru.mvista.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/drivers/serial/cpm_uart/cpm_uart_cpm2.c b/drivers/serial/cpm_uart/cpm_uart_cpm2.c
index 7c6b07aeea92..4b2de08f46d0 100644
--- a/drivers/serial/cpm_uart/cpm_uart_cpm2.c
+++ b/drivers/serial/cpm_uart/cpm_uart_cpm2.c
@@ -8,6 +8,8 @@
  * 
  *  Copyright (C) 2004 Freescale Semiconductor, Inc.
  *            (C) 2004 Intracom, S.A.
+ *            (C) 2006 MontaVista Software, Inc.
+ *              Vitaly Bordug <vbordug@ru.mvista.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/include/asm-powerpc/uaccess.h b/include/asm-powerpc/uaccess.h
index 3872e924cdd6..d83fc29c2bbf 100644
--- a/include/asm-powerpc/uaccess.h
+++ b/include/asm-powerpc/uaccess.h
@@ -7,6 +7,7 @@
 #include <linux/sched.h>
 #include <linux/errno.h>
 #include <asm/processor.h>
+#include <asm/page.h>
 
 #define VERIFY_READ     0
 #define VERIFY_WRITE    1
@@ -179,9 +180,11 @@ do {								\
 #define __put_user_nocheck(x, ptr, size)                        \
 ({                                                              \
         long __pu_err;                                          \
-        might_sleep();                                          \
+        __typeof__(*(ptr)) __user *__pu_addr = (ptr);           \
+        if (!is_kernel_addr((unsigned long)__pu_addr))          \
+                might_sleep();                                  \
         __chk_user_ptr(ptr);                                    \
-        __put_user_size((x), (ptr), (size), __pu_err);          \
+        __put_user_size((x), __pu_addr, (size), __pu_err);      \
         __pu_err;                                               \
 })
 
@@ -258,9 +261,11 @@ do {								\
 ({                                                              \
         long __gu_err;                                          \
         unsigned long __gu_val;                                 \
+        const __typeof__(*(ptr)) __user *__gu_addr = (ptr);     \
         __chk_user_ptr(ptr);                                    \
-        might_sleep();                                          \
-        __get_user_size(__gu_val, (ptr), (size), __gu_err);     \
+        if (!is_kernel_addr((unsigned long)__gu_addr))          \
+                might_sleep();                                  \
+        __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \
         (x) = (__typeof__(*(ptr)))__gu_val;                     \
         __gu_err;                                               \
 })
@@ -270,9 +275,11 @@ do {								\
 ({                                                              \
         long __gu_err;                                          \
         long long __gu_val;                                     \
+        const __typeof__(*(ptr)) __user *__gu_addr = (ptr);     \
         __chk_user_ptr(ptr);                                    \
-        might_sleep();                                          \
-        __get_user_size(__gu_val, (ptr), (size), __gu_err);     \
+        if (!is_kernel_addr((unsigned long)__gu_addr))          \
+                might_sleep();                                  \
+        __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \
         (x) = (__typeof__(*(ptr)))__gu_val;                     \
         __gu_err;                                               \
 })
diff --git a/include/asm-ppc/commproc.h b/include/asm-ppc/commproc.h
index 973e60908234..31f362966a58 100644
--- a/include/asm-ppc/commproc.h
+++ b/include/asm-ppc/commproc.h
@@ -35,6 +35,7 @@
 #define CPM_CR_INIT_TX          ((ushort)0x0002)
 #define CPM_CR_HUNT_MODE        ((ushort)0x0003)
 #define CPM_CR_STOP_TX          ((ushort)0x0004)
+#define CPM_CR_GRA_STOP_TX      ((ushort)0x0005)
 #define CPM_CR_RESTART_TX       ((ushort)0x0006)
 #define CPM_CR_CLOSE_RX_BD      ((ushort)0x0007)
 #define CPM_CR_SET_GADDR        ((ushort)0x0008)
diff --git a/include/asm-ppc/cpm2.h b/include/asm-ppc/cpm2.h
index b638b87cebe3..c70344b91049 100644
--- a/include/asm-ppc/cpm2.h
+++ b/include/asm-ppc/cpm2.h
@@ -69,7 +69,7 @@
 #define CPM_CR_INIT_TX          ((ushort)0x0002)
 #define CPM_CR_HUNT_MODE        ((ushort)0x0003)
 #define CPM_CR_STOP_TX          ((ushort)0x0004)
-#define CPM_CR_GRA_STOP_TX      ((ushort)0x0005)
+#define CPM_CR_GRA_STOP_TX      ((ushort)0x0005)
 #define CPM_CR_RESTART_TX       ((ushort)0x0006)
 #define CPM_CR_SET_GADDR        ((ushort)0x0008)
 #define CPM_CR_START_IDMA       ((ushort)0x0009)
diff --git a/include/linux/fs_uart_pd.h b/include/linux/fs_uart_pd.h
new file mode 100644
index 000000000000..f5975126b712
--- /dev/null
+++ b/include/linux/fs_uart_pd.h
@@ -0,0 +1,60 @@
+/*
+ * Platform information definitions for the CPM Uart driver.
+ *
+ * 2006 (c) MontaVista Software, Inc.
+ * Vitaly Bordug <vbordug@ru.mvista.com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#ifndef FS_UART_PD_H
+#define FS_UART_PD_H
+
+#include <linux/version.h>
+#include <asm/types.h>
+
+enum fs_uart_id {
+        fsid_smc1_uart,
+        fsid_smc2_uart,
+        fsid_scc1_uart,
+        fsid_scc2_uart,
+        fsid_scc3_uart,
+        fsid_scc4_uart,
+        fs_uart_nr,
+};
+
+static inline int fs_uart_id_scc2fsid(int id)
+{
+    return fsid_scc1_uart + id - 1;
+}
+
+static inline int fs_uart_id_fsid2scc(int id)
+{
+    return id - fsid_scc1_uart + 1;
+}
+
+static inline int fs_uart_id_smc2fsid(int id)
+{
+    return fsid_smc1_uart + id - 1;
+}
+
+static inline int fs_uart_id_fsid2smc(int id)
+{
+    return id - fsid_smc1_uart + 1;
+}
+
+struct fs_uart_platform_info {
+        void(*init_ioports)(void);
+        /* device specific information */
+        int fs_no;              /* controller index */
+        u32 uart_clk;
+        u8 tx_num_fifo;
+        u8 tx_buf_size;
+        u8 rx_num_fifo;
+        u8 rx_buf_size;
+        u8 brg;
+};
+
+#endif