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authorLinus Torvalds <torvalds@linux-foundation.org>2012-12-12 17:50:34 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-12 17:50:34 -0800
commite37aa63e87bd581f9be5555ed0ba83f5295c92fc (patch)
tree83b57ba86bb9526f08ff4ed99e7e432dfceef4f6 /arch/mn10300
parent9977d9b379cb77e0f67bd6f4563618106e58e11d (diff)
parent76583cffb77533fe564aaf21d184b89a5f419ffe (diff)
downloadlinux-linaro-stable-e37aa63e87bd581f9be5555ed0ba83f5295c92fc.tar.gz
Merge tag 'for-linus-20121212' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-mn10300
Pull MN10300 changes from David Howells: "miscellaneous MN10300 arch patches. I've based it on top of Al Viro's signal tree - so these patches should be pulled after that." * tag 'for-linus-20121212' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-mn10300: MN10300: Use asm-generic/pci_iomap.h MN10300: Get rid of unused variable from ASB2305 PCI code MN10300: ASB2305 PCI code needs linux/irq.h mn10300/mm/fault.c: Port OOM changes to do_page_fault MN10300: Handle cacheable PCI regions in pci_iomap() MN10300: fix debug polling in ttySM driver MN10300: ttySM: clean up unnecessary casting MN10300: fix SMP synchronization between txdma and serial driver MN10300: fix serial port vdma irq setup for SMP MN10300: cleanup IRQ affinity setting MN10300: ttySM: Use memory barriers correctly in circular buffer logic
Diffstat (limited to 'arch/mn10300')
-rw-r--r--arch/mn10300/include/asm/io.h3
-rw-r--r--arch/mn10300/kernel/asm-offsets.c2
-rw-r--r--arch/mn10300/kernel/irq.c50
-rw-r--r--arch/mn10300/kernel/mn10300-serial-low.S9
-rw-r--r--arch/mn10300/kernel/mn10300-serial.c213
-rw-r--r--arch/mn10300/kernel/mn10300-serial.h10
-rw-r--r--arch/mn10300/kernel/smp.c10
-rw-r--r--arch/mn10300/mm/fault.c33
-rw-r--r--arch/mn10300/unit-asb2305/pci-iomap.c35
-rw-r--r--arch/mn10300/unit-asb2305/pci.c5
10 files changed, 234 insertions, 136 deletions
diff --git a/arch/mn10300/include/asm/io.h b/arch/mn10300/include/asm/io.h
index 139df8c53de8..e6ed0d897ccc 100644
--- a/arch/mn10300/include/asm/io.h
+++ b/arch/mn10300/include/asm/io.h
@@ -14,6 +14,7 @@
#include <asm/page.h> /* I/O is all done through memory accesses */
#include <asm/cpu-regs.h>
#include <asm/cacheflush.h>
+#include <asm-generic/pci_iomap.h>
#define mmiowb() do {} while (0)
@@ -258,7 +259,7 @@ static inline void __iomem *__ioremap(unsigned long offset, unsigned long size,
static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
{
- return (void __iomem *) offset;
+ return (void __iomem *)(offset & ~0x20000000);
}
/*
diff --git a/arch/mn10300/kernel/asm-offsets.c b/arch/mn10300/kernel/asm-offsets.c
index 96f24fab7de6..47b3bb0c04ff 100644
--- a/arch/mn10300/kernel/asm-offsets.c
+++ b/arch/mn10300/kernel/asm-offsets.c
@@ -96,7 +96,7 @@ void foo(void)
OFFSET(__rx_outp, mn10300_serial_port, rx_outp);
OFFSET(__uart_state, mn10300_serial_port, uart.state);
OFFSET(__tx_xchar, mn10300_serial_port, tx_xchar);
- OFFSET(__tx_break, mn10300_serial_port, tx_break);
+ OFFSET(__tx_flags, mn10300_serial_port, tx_flags);
OFFSET(__intr_flags, mn10300_serial_port, intr_flags);
OFFSET(__rx_icr, mn10300_serial_port, rx_icr);
OFFSET(__tx_icr, mn10300_serial_port, tx_icr);
diff --git a/arch/mn10300/kernel/irq.c b/arch/mn10300/kernel/irq.c
index 35932a8de8b8..6ab3b73efcf8 100644
--- a/arch/mn10300/kernel/irq.c
+++ b/arch/mn10300/kernel/irq.c
@@ -142,57 +142,11 @@ mn10300_cpupic_setaffinity(struct irq_data *d, const struct cpumask *mask,
bool force)
{
unsigned long flags;
- int err;
flags = arch_local_cli_save();
-
- /* check irq no */
- switch (d->irq) {
- case TMJCIRQ:
- case RESCHEDULE_IPI:
- case CALL_FUNC_SINGLE_IPI:
- case LOCAL_TIMER_IPI:
- case FLUSH_CACHE_IPI:
- case CALL_FUNCTION_NMI_IPI:
- case DEBUGGER_NMI_IPI:
-#ifdef CONFIG_MN10300_TTYSM0
- case SC0RXIRQ:
- case SC0TXIRQ:
-#ifdef CONFIG_MN10300_TTYSM0_TIMER8
- case TM8IRQ:
-#elif CONFIG_MN10300_TTYSM0_TIMER2
- case TM2IRQ:
-#endif /* CONFIG_MN10300_TTYSM0_TIMER8 */
-#endif /* CONFIG_MN10300_TTYSM0 */
-
-#ifdef CONFIG_MN10300_TTYSM1
- case SC1RXIRQ:
- case SC1TXIRQ:
-#ifdef CONFIG_MN10300_TTYSM1_TIMER12
- case TM12IRQ:
-#elif defined(CONFIG_MN10300_TTYSM1_TIMER9)
- case TM9IRQ:
-#elif defined(CONFIG_MN10300_TTYSM1_TIMER3)
- case TM3IRQ:
-#endif /* CONFIG_MN10300_TTYSM1_TIMER12 */
-#endif /* CONFIG_MN10300_TTYSM1 */
-
-#ifdef CONFIG_MN10300_TTYSM2
- case SC2RXIRQ:
- case SC2TXIRQ:
- case TM10IRQ:
-#endif /* CONFIG_MN10300_TTYSM2 */
- err = -1;
- break;
-
- default:
- set_bit(d->irq, irq_affinity_request);
- err = 0;
- break;
- }
-
+ set_bit(d->irq, irq_affinity_request);
arch_local_irq_restore(flags);
- return err;
+ return 0;
}
#endif /* CONFIG_SMP */
diff --git a/arch/mn10300/kernel/mn10300-serial-low.S b/arch/mn10300/kernel/mn10300-serial-low.S
index dfc1b6f2fa9a..b95e76caf4fa 100644
--- a/arch/mn10300/kernel/mn10300-serial-low.S
+++ b/arch/mn10300/kernel/mn10300-serial-low.S
@@ -118,8 +118,8 @@ ENTRY(mn10300_serial_vdma_tx_handler)
movbu d2,(e3) # ACK the interrupt
movhu (e3),d2 # flush
- btst 0x01,(__tx_break,a3) # handle transmit break request
- bne mnsc_vdma_tx_break
+ btst 0xFF,(__tx_flags,a3) # handle transmit flags
+ bne mnsc_vdma_tx_flags
movbu (SCxSTR,e2),d2 # don't try and transmit a char if the
# buffer is not empty
@@ -171,10 +171,13 @@ mnsc_vdma_tx_empty:
bset MNSCx_TX_EMPTY,(__intr_flags,a3)
bra mnsc_vdma_tx_done
-mnsc_vdma_tx_break:
+mnsc_vdma_tx_flags:
+ btst MNSCx_TX_STOP,(__tx_flags,a3)
+ bne mnsc_vdma_tx_stop
movhu (SCxCTR,e2),d2 # turn on break mode
or SC01CTR_BKE,d2
movhu d2,(SCxCTR,e2)
+mnsc_vdma_tx_stop:
mov +(NUM2GxICR_LEVEL(CONFIG_MN10300_SERIAL_IRQ_LEVEL)|GxICR_DETECT),d2
movhu d2,(e3) # disable transmit interrupts on this
# channel
diff --git a/arch/mn10300/kernel/mn10300-serial.c b/arch/mn10300/kernel/mn10300-serial.c
index 339cef4c8256..81d5cb9b6569 100644
--- a/arch/mn10300/kernel/mn10300-serial.c
+++ b/arch/mn10300/kernel/mn10300-serial.c
@@ -408,6 +408,34 @@ static struct irq_chip mn10300_serial_pic = {
.irq_unmask = mn10300_serial_nop,
};
+static void mn10300_serial_low_mask(struct irq_data *d)
+{
+ unsigned long flags;
+ u16 tmp;
+
+ flags = arch_local_cli_save();
+ GxICR(d->irq) = NUM2GxICR_LEVEL(CONFIG_MN10300_SERIAL_IRQ_LEVEL);
+ tmp = GxICR(d->irq); /* flush write buffer */
+ arch_local_irq_restore(flags);
+}
+
+static void mn10300_serial_low_unmask(struct irq_data *d)
+{
+ unsigned long flags;
+ u16 tmp;
+
+ flags = arch_local_cli_save();
+ GxICR(d->irq) =
+ NUM2GxICR_LEVEL(CONFIG_MN10300_SERIAL_IRQ_LEVEL) | GxICR_ENABLE;
+ tmp = GxICR(d->irq); /* flush write buffer */
+ arch_local_irq_restore(flags);
+}
+
+static struct irq_chip mn10300_serial_low_pic = {
+ .name = "mnserial-low",
+ .irq_mask = mn10300_serial_low_mask,
+ .irq_unmask = mn10300_serial_low_unmask,
+};
/*
* serial virtual DMA interrupt jump table
@@ -416,25 +444,53 @@ struct mn10300_serial_int mn10300_serial_int_tbl[NR_IRQS];
static void mn10300_serial_dis_tx_intr(struct mn10300_serial_port *port)
{
- unsigned long flags;
+ int retries = 100;
u16 x;
- flags = arch_local_cli_save();
- *port->tx_icr = NUM2GxICR_LEVEL(CONFIG_MN10300_SERIAL_IRQ_LEVEL);
- x = *port->tx_icr;
- arch_local_irq_restore(flags);
+ /* nothing to do if irq isn't set up */
+ if (!mn10300_serial_int_tbl[port->tx_irq].port)
+ return;
+
+ port->tx_flags |= MNSCx_TX_STOP;
+ mb();
+
+ /*
+ * Here we wait for the irq to be disabled. Either it already is
+ * disabled or we wait some number of retries for the VDMA handler
+ * to disable it. The retries give the VDMA handler enough time to
+ * run to completion if it was already in progress. If the VDMA IRQ
+ * is enabled but the handler is not yet running when arrive here,
+ * the STOP flag will prevent the handler from conflicting with the
+ * driver code following this loop.
+ */
+ while ((*port->tx_icr & GxICR_ENABLE) && retries-- > 0)
+ ;
+ if (retries <= 0) {
+ *port->tx_icr =
+ NUM2GxICR_LEVEL(CONFIG_MN10300_SERIAL_IRQ_LEVEL);
+ x = *port->tx_icr;
+ }
}
static void mn10300_serial_en_tx_intr(struct mn10300_serial_port *port)
{
- unsigned long flags;
u16 x;
- flags = arch_local_cli_save();
+ /* nothing to do if irq isn't set up */
+ if (!mn10300_serial_int_tbl[port->tx_irq].port)
+ return;
+
+ /* stop vdma irq if not already stopped */
+ if (!(port->tx_flags & MNSCx_TX_STOP))
+ mn10300_serial_dis_tx_intr(port);
+
+ port->tx_flags &= ~MNSCx_TX_STOP;
+ mb();
+
*port->tx_icr =
- NUM2GxICR_LEVEL(CONFIG_MN10300_SERIAL_IRQ_LEVEL) | GxICR_ENABLE;
+ NUM2GxICR_LEVEL(CONFIG_MN10300_SERIAL_IRQ_LEVEL) |
+ GxICR_ENABLE | GxICR_REQUEST | GxICR_DETECT;
x = *port->tx_icr;
- arch_local_irq_restore(flags);
}
static void mn10300_serial_dis_rx_intr(struct mn10300_serial_port *port)
@@ -487,16 +543,17 @@ static void mn10300_serial_receive_interrupt(struct mn10300_serial_port *port)
try_again:
/* pull chars out of the hat */
- ix = port->rx_outp;
- if (ix == port->rx_inp) {
+ ix = ACCESS_ONCE(port->rx_outp);
+ if (CIRC_CNT(port->rx_inp, ix, MNSC_BUFFER_SIZE) == 0) {
if (push && !tty->low_latency)
tty_flip_buffer_push(tty);
return;
}
+ smp_read_barrier_depends();
ch = port->rx_buffer[ix++];
st = port->rx_buffer[ix++];
- smp_rmb();
+ smp_mb();
port->rx_outp = ix & (MNSC_BUFFER_SIZE - 1);
port->uart.icount.rx++;
@@ -778,8 +835,6 @@ static void mn10300_serial_start_tx(struct uart_port *_port)
struct mn10300_serial_port *port =
container_of(_port, struct mn10300_serial_port, uart);
- u16 x;
-
_enter("%s{%lu}",
port->name,
CIRC_CNT(&port->uart.state->xmit.head,
@@ -787,14 +842,7 @@ static void mn10300_serial_start_tx(struct uart_port *_port)
UART_XMIT_SIZE));
/* kick the virtual DMA controller */
- arch_local_cli();
- x = *port->tx_icr;
- x |= GxICR_ENABLE;
-
- if (*port->_status & SC01STR_TBF)
- x &= ~(GxICR_REQUEST | GxICR_DETECT);
- else
- x |= GxICR_REQUEST | GxICR_DETECT;
+ mn10300_serial_en_tx_intr(port);
_debug("CTR=%04hx ICR=%02hx STR=%04x TMD=%02hx TBR=%04hx ICR=%04hx",
*port->_control, *port->_intr, *port->_status,
@@ -802,10 +850,6 @@ static void mn10300_serial_start_tx(struct uart_port *_port)
(port->div_timer == MNSCx_DIV_TIMER_8BIT) ?
*(volatile u8 *)port->_tmxbr : *port->_tmxbr,
*port->tx_icr);
-
- *port->tx_icr = x;
- x = *port->tx_icr;
- arch_local_sti();
}
/*
@@ -815,13 +859,17 @@ static void mn10300_serial_send_xchar(struct uart_port *_port, char ch)
{
struct mn10300_serial_port *port =
container_of(_port, struct mn10300_serial_port, uart);
+ unsigned long flags;
_enter("%s,%02x", port->name, ch);
if (likely(port->gdbstub)) {
port->tx_xchar = ch;
- if (ch)
+ if (ch) {
+ spin_lock_irqsave(&port->uart.lock, flags);
mn10300_serial_en_tx_intr(port);
+ spin_unlock_irqrestore(&port->uart.lock, flags);
+ }
}
}
@@ -882,18 +930,21 @@ static void mn10300_serial_break_ctl(struct uart_port *_port, int ctl)
{
struct mn10300_serial_port *port =
container_of(_port, struct mn10300_serial_port, uart);
+ unsigned long flags;
_enter("%s,%d", port->name, ctl);
+ spin_lock_irqsave(&port->uart.lock, flags);
if (ctl) {
/* tell the virtual DMA handler to assert BREAK */
- port->tx_break = 1;
+ port->tx_flags |= MNSCx_TX_BREAK;
mn10300_serial_en_tx_intr(port);
} else {
- port->tx_break = 0;
+ port->tx_flags &= ~MNSCx_TX_BREAK;
*port->_control &= ~SC01CTR_BKE;
mn10300_serial_en_tx_intr(port);
}
+ spin_unlock_irqrestore(&port->uart.lock, flags);
}
/*
@@ -916,6 +967,7 @@ static int mn10300_serial_startup(struct uart_port *_port)
return -ENOMEM;
port->rx_inp = port->rx_outp = 0;
+ port->tx_flags = 0;
/* finally, enable the device */
*port->_intr = SC01ICR_TI;
@@ -928,22 +980,23 @@ static int mn10300_serial_startup(struct uart_port *_port)
pint->port = port;
pint->vdma = mn10300_serial_vdma_tx_handler;
- set_intr_level(port->rx_irq,
- NUM2GxICR_LEVEL(CONFIG_MN10300_SERIAL_IRQ_LEVEL));
- set_intr_level(port->tx_irq,
- NUM2GxICR_LEVEL(CONFIG_MN10300_SERIAL_IRQ_LEVEL));
+ irq_set_chip(port->rx_irq, &mn10300_serial_low_pic);
+ irq_set_chip(port->tx_irq, &mn10300_serial_low_pic);
irq_set_chip(port->tm_irq, &mn10300_serial_pic);
if (request_irq(port->rx_irq, mn10300_serial_interrupt,
- IRQF_DISABLED, port->rx_name, port) < 0)
+ IRQF_DISABLED | IRQF_NOBALANCING,
+ port->rx_name, port) < 0)
goto error;
if (request_irq(port->tx_irq, mn10300_serial_interrupt,
- IRQF_DISABLED, port->tx_name, port) < 0)
+ IRQF_DISABLED | IRQF_NOBALANCING,
+ port->tx_name, port) < 0)
goto error2;
if (request_irq(port->tm_irq, mn10300_serial_interrupt,
- IRQF_DISABLED, port->tm_name, port) < 0)
+ IRQF_DISABLED | IRQF_NOBALANCING,
+ port->tm_name, port) < 0)
goto error3;
mn10300_serial_mask_ack(port->tm_irq);
@@ -964,14 +1017,22 @@ error:
*/
static void mn10300_serial_shutdown(struct uart_port *_port)
{
+ unsigned long flags;
u16 x;
struct mn10300_serial_port *port =
container_of(_port, struct mn10300_serial_port, uart);
_enter("%s", port->name);
+ spin_lock_irqsave(&_port->lock, flags);
+ mn10300_serial_dis_tx_intr(port);
+
+ *port->rx_icr = NUM2GxICR_LEVEL(CONFIG_MN10300_SERIAL_IRQ_LEVEL);
+ x = *port->rx_icr;
+ port->tx_flags = 0;
+ spin_unlock_irqrestore(&_port->lock, flags);
+
/* disable the serial port and its baud rate timer */
- port->tx_break = 0;
*port->_control &= ~(SC01CTR_TXE | SC01CTR_RXE | SC01CTR_BKE);
*port->_tmxmd = 0;
@@ -986,12 +1047,8 @@ static void mn10300_serial_shutdown(struct uart_port *_port)
free_irq(port->rx_irq, port);
free_irq(port->tx_irq, port);
- arch_local_cli();
- *port->rx_icr = NUM2GxICR_LEVEL(CONFIG_MN10300_SERIAL_IRQ_LEVEL);
- x = *port->rx_icr;
- *port->tx_icr = NUM2GxICR_LEVEL(CONFIG_MN10300_SERIAL_IRQ_LEVEL);
- x = *port->tx_icr;
- arch_local_sti();
+ mn10300_serial_int_tbl[port->tx_irq].port = NULL;
+ mn10300_serial_int_tbl[port->rx_irq].port = NULL;
}
/*
@@ -1317,7 +1374,8 @@ timer_okay:
if ((new->c_cflag & CREAD) == 0)
port->uart.ignore_status_mask |= (1 << TTY_NORMAL);
- scxctr |= *port->_control & (SC01CTR_TXE | SC01CTR_RXE | SC01CTR_BKE);
+ scxctr |= SC01CTR_TXE | SC01CTR_RXE;
+ scxctr |= *port->_control & SC01CTR_BKE;
*port->_control = scxctr;
spin_unlock_irqrestore(&port->uart.lock, flags);
@@ -1519,17 +1577,24 @@ static void mn10300_serial_console_write(struct console *co,
{
struct mn10300_serial_port *port;
unsigned i;
- u16 scxctr, txicr, tmp;
+ u16 scxctr;
u8 tmxmd;
+ unsigned long flags;
+ int locked = 1;
port = mn10300_serial_ports[co->index];
+ local_irq_save(flags);
+ if (port->uart.sysrq) {
+ /* mn10300_serial_interrupt() already took the lock */
+ locked = 0;
+ } else if (oops_in_progress) {
+ locked = spin_trylock(&port->uart.lock);
+ } else
+ spin_lock(&port->uart.lock);
+
/* firstly hijack the serial port from the "virtual DMA" controller */
- arch_local_cli();
- txicr = *port->tx_icr;
- *port->tx_icr = NUM2GxICR_LEVEL(CONFIG_MN10300_SERIAL_IRQ_LEVEL);
- tmp = *port->tx_icr;
- arch_local_sti();
+ mn10300_serial_dis_tx_intr(port);
/* the transmitter may be disabled */
scxctr = *port->_control;
@@ -1565,12 +1630,12 @@ static void mn10300_serial_console_write(struct console *co,
while (*port->_status & SC01STR_TBF)
continue;
- *(u8 *) port->_txb = ch;
+ *port->_txb = ch;
if (ch == 0x0a) {
while (*port->_status & SC01STR_TBF)
continue;
- *(u8 *) port->_txb = 0xd;
+ *port->_txb = 0xd;
}
}
@@ -1583,10 +1648,11 @@ static void mn10300_serial_console_write(struct console *co,
if (!(scxctr & SC01CTR_TXE))
*port->_control = scxctr;
- arch_local_cli();
- *port->tx_icr = txicr;
- tmp = *port->tx_icr;
- arch_local_sti();
+ mn10300_serial_en_tx_intr(port);
+
+ if (locked)
+ spin_unlock(&port->uart.lock);
+ local_irq_restore(flags);
}
/*
@@ -1655,18 +1721,29 @@ static int mn10300_serial_poll_get_char(struct uart_port *_port)
_enter("%s", port->name);
- do {
- /* pull chars out of the hat */
- ix = port->rx_outp;
- if (ix == port->rx_inp)
- return NO_POLL_CHAR;
+ if (mn10300_serial_int_tbl[port->rx_irq].port != NULL) {
+ do {
+ /* pull chars out of the hat */
+ ix = ACCESS_ONCE(port->rx_outp);
+ if (CIRC_CNT(port->rx_inp, ix, MNSC_BUFFER_SIZE) == 0)
+ return NO_POLL_CHAR;
- ch = port->rx_buffer[ix++];
- st = port->rx_buffer[ix++];
- smp_rmb();
- port->rx_outp = ix & (MNSC_BUFFER_SIZE - 1);
+ smp_read_barrier_depends();
+ ch = port->rx_buffer[ix++];
+ st = port->rx_buffer[ix++];
+ smp_mb();
+ port->rx_outp = ix & (MNSC_BUFFER_SIZE - 1);
- } while (st & (SC01STR_FEF | SC01STR_PEF | SC01STR_OEF));
+ } while (st & (SC01STR_FEF | SC01STR_PEF | SC01STR_OEF));
+ } else {
+ do {
+ st = *port->_status;
+ if (st & (SC01STR_FEF | SC01STR_PEF | SC01STR_OEF))
+ continue;
+ } while (!(st & SC01STR_RBF));
+
+ ch = *port->_rxb;
+ }
return ch;
}
@@ -1693,12 +1770,12 @@ static void mn10300_serial_poll_put_char(struct uart_port *_port,
tmp = *port->_intr;
if (ch == 0x0a) {
- *(u8 *) port->_txb = 0x0d;
+ *port->_txb = 0x0d;
while (*port->_status & SC01STR_TBF)
continue;
}
- *(u8 *) port->_txb = ch;
+ *port->_txb = ch;
while (*port->_status & SC01STR_TBF)
continue;
diff --git a/arch/mn10300/kernel/mn10300-serial.h b/arch/mn10300/kernel/mn10300-serial.h
index 6796499bf789..01791c68ea1f 100644
--- a/arch/mn10300/kernel/mn10300-serial.h
+++ b/arch/mn10300/kernel/mn10300-serial.h
@@ -29,6 +29,10 @@
#define MNSCx_TX_SPACE 0x04
#define MNSCx_TX_EMPTY 0x08
+/* tx_flags bits */
+#define MNSCx_TX_BREAK 0x01
+#define MNSCx_TX_STOP 0x02
+
#ifndef __ASSEMBLY__
struct mn10300_serial_port {
@@ -36,7 +40,7 @@ struct mn10300_serial_port {
unsigned rx_inp; /* pointer to rx input offset */
unsigned rx_outp; /* pointer to rx output offset */
u8 tx_xchar; /* high-priority XON/XOFF buffer */
- u8 tx_break; /* transmit break request */
+ u8 tx_flags; /* transmit break/stop request */
u8 intr_flags; /* interrupt flags */
volatile u16 *rx_icr; /* Rx interrupt control register */
volatile u16 *tx_icr; /* Tx interrupt control register */
@@ -54,8 +58,8 @@ struct mn10300_serial_port {
volatile u16 *_control; /* control register pointer */
volatile u8 *_status; /* status register pointer */
volatile u8 *_intr; /* interrupt register pointer */
- volatile void *_rxb; /* receive buffer register pointer */
- volatile void *_txb; /* transmit buffer register pointer */
+ volatile u8 *_rxb; /* receive buffer register pointer */
+ volatile u8 *_txb; /* transmit buffer register pointer */
volatile u16 *_tmicr; /* timer interrupt control register */
volatile u8 *_tmxmd; /* baud rate timer mode register */
volatile u16 *_tmxbr; /* baud rate timer base register */
diff --git a/arch/mn10300/kernel/smp.c b/arch/mn10300/kernel/smp.c
index e62c223e4c45..95983cd21e77 100644
--- a/arch/mn10300/kernel/smp.c
+++ b/arch/mn10300/kernel/smp.c
@@ -130,10 +130,12 @@ static irqreturn_t smp_call_function_interrupt(int irq, void *dev_id);
static struct irqaction reschedule_ipi = {
.handler = smp_reschedule_interrupt,
+ .flags = IRQF_NOBALANCING,
.name = "smp reschedule IPI"
};
static struct irqaction call_function_ipi = {
.handler = smp_call_function_interrupt,
+ .flags = IRQF_NOBALANCING,
.name = "smp call function IPI"
};
@@ -141,7 +143,7 @@ static struct irqaction call_function_ipi = {
static irqreturn_t smp_ipi_timer_interrupt(int irq, void *dev_id);
static struct irqaction local_timer_ipi = {
.handler = smp_ipi_timer_interrupt,
- .flags = IRQF_DISABLED,
+ .flags = IRQF_DISABLED | IRQF_NOBALANCING,
.name = "smp local timer IPI"
};
#endif
@@ -180,6 +182,7 @@ static void init_ipi(void)
#ifdef CONFIG_MN10300_CACHE_ENABLED
/* set up the cache flush IPI */
+ irq_set_chip(FLUSH_CACHE_IPI, &mn10300_ipi_type);
flags = arch_local_cli_save();
__set_intr_stub(NUM2EXCEP_IRQ_LEVEL(FLUSH_CACHE_GxICR_LV),
mn10300_low_ipi_handler);
@@ -189,6 +192,7 @@ static void init_ipi(void)
#endif
/* set up the NMI call function IPI */
+ irq_set_chip(CALL_FUNCTION_NMI_IPI, &mn10300_ipi_type);
flags = arch_local_cli_save();
GxICR(CALL_FUNCTION_NMI_IPI) = GxICR_NMI | GxICR_ENABLE | GxICR_DETECT;
tmp16 = GxICR(CALL_FUNCTION_NMI_IPI);
@@ -199,6 +203,10 @@ static void init_ipi(void)
__set_intr_stub(NUM2EXCEP_IRQ_LEVEL(SMP_BOOT_GxICR_LV),
mn10300_low_ipi_handler);
arch_local_irq_restore(flags);
+
+#ifdef CONFIG_KERNEL_DEBUGGER
+ irq_set_chip(DEBUGGER_NMI_IPI, &mn10300_ipi_type);
+#endif
}
/**
diff --git a/arch/mn10300/mm/fault.c b/arch/mn10300/mm/fault.c
index 90f346f7392d..d48a84fd7fae 100644
--- a/arch/mn10300/mm/fault.c
+++ b/arch/mn10300/mm/fault.c
@@ -123,7 +123,8 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long fault_code,
struct mm_struct *mm;
unsigned long page;
siginfo_t info;
- int write, fault;
+ int fault;
+ unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
#ifdef CONFIG_GDBSTUB
/* handle GDB stub causing a fault */
@@ -170,6 +171,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long fault_code,
if (in_atomic() || !mm)
goto no_context;
+retry:
down_read(&mm->mmap_sem);
vma = find_vma(mm, address);
@@ -220,7 +222,6 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long fault_code,
*/
good_area:
info.si_code = SEGV_ACCERR;
- write = 0;
switch (fault_code & (MMUFCR_xFC_PGINVAL|MMUFCR_xFC_TYPE)) {
default: /* 3: write, present */
case MMUFCR_xFC_TYPE_WRITE:
@@ -232,7 +233,7 @@ good_area:
case MMUFCR_xFC_PGINVAL | MMUFCR_xFC_TYPE_WRITE:
if (!(vma->vm_flags & VM_WRITE))
goto bad_area;
- write++;
+ flags |= FAULT_FLAG_WRITE;
break;
/* read from protected page */
@@ -251,7 +252,11 @@ good_area:
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(mm, vma, address, write ? FAULT_FLAG_WRITE : 0);
+ fault = handle_mm_fault(mm, vma, address, flags);
+
+ if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current))
+ return;
+
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
@@ -259,10 +264,22 @@ good_area:
goto do_sigbus;
BUG();
}
- if (fault & VM_FAULT_MAJOR)
- current->maj_flt++;
- else
- current->min_flt++;
+ if (flags & FAULT_FLAG_ALLOW_RETRY) {
+ if (fault & VM_FAULT_MAJOR)
+ current->maj_flt++;
+ else
+ current->min_flt++;
+ if (fault & VM_FAULT_RETRY) {
+ flags &= ~FAULT_FLAG_ALLOW_RETRY;
+
+ /* No need to up_read(&mm->mmap_sem) as we would
+ * have already released it in __lock_page_or_retry
+ * in mm/filemap.c.
+ */
+
+ goto retry;
+ }
+ }
up_read(&mm->mmap_sem);
return;
diff --git a/arch/mn10300/unit-asb2305/pci-iomap.c b/arch/mn10300/unit-asb2305/pci-iomap.c
new file mode 100644
index 000000000000..bd65dae17f32
--- /dev/null
+++ b/arch/mn10300/unit-asb2305/pci-iomap.c
@@ -0,0 +1,35 @@
+/* ASB2305 PCI I/O mapping handler
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#include <linux/pci.h>
+#include <linux/module.h>
+
+/*
+ * Create a virtual mapping cookie for a PCI BAR (memory or IO)
+ */
+void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
+{
+ resource_size_t start = pci_resource_start(dev, bar);
+ resource_size_t len = pci_resource_len(dev, bar);
+ unsigned long flags = pci_resource_flags(dev, bar);
+
+ if (!len || !start)
+ return NULL;
+
+ if ((flags & IORESOURCE_IO) || (flags & IORESOURCE_MEM)) {
+ if (flags & IORESOURCE_CACHEABLE && !(flags & IORESOURCE_IO))
+ return ioremap(start, len);
+ else
+ return ioremap_nocache(start, len);
+ }
+
+ return NULL;
+}
+EXPORT_SYMBOL(pci_iomap);
diff --git a/arch/mn10300/unit-asb2305/pci.c b/arch/mn10300/unit-asb2305/pci.c
index 6dce9fc2cf3c..e2059486d3f8 100644
--- a/arch/mn10300/unit-asb2305/pci.c
+++ b/arch/mn10300/unit-asb2305/pci.c
@@ -17,6 +17,7 @@
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/delay.h>
+#include <linux/irq.h>
#include <asm/io.h>
#include "pci-asb2305.h"
@@ -303,9 +304,7 @@ static int __devinit is_valid_resource(struct pci_dev *dev, int idx)
static void __devinit pcibios_fixup_device_resources(struct pci_dev *dev)
{
- struct pci_bus_region region;
- int i;
- int limit;
+ int limit, i;
if (dev->bus->number != 0)
return;