cris build fixes: corrected and improved NMI and IRQ handling
Corrects compile errors and the following: - Remove oldset parameter from do_signal and do_notify_resume. - Modified to fit new consolidated IRQ handling code. - Reverse check order between external nmi and watchdog nmi to avoid false watchdog oops in case of a glitch on the nmi pin. - Return from an pin-generated NMI the same way as for other interrupts. - Moved blocking of ethernet rx/tx irq from ethernet interrupt handler to low-level asm interrupt handlers. Fixed in the multiple interrupt handler also. - Add space for thread local storage in thread_info struct. - Add NO_DMA to Kconfig, and include arch specific Kconfig using arch independent path. Include subsystem Kconfigs for pcmcia, usb, i2c, rtc and pci. Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com> Acked-by: Mikael Starvik <starvik@axis.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jesper Nilsson
Linus Torvalds
parent
633edf5a4f
commit
7b275523ab
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@ -13,6 +13,10 @@ config ZONE_DMA
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bool
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default y
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config NO_DMA
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bool
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default y
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config RWSEM_GENERIC_SPINLOCK
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bool
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default y
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@ -153,7 +157,8 @@ source "net/Kconfig"
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# bring in ETRAX built-in drivers
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menu "Drivers for built-in interfaces"
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source arch/cris/arch-v10/drivers/Kconfig
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# arch/cris/arch is a symlink to correct arch (arch-v10 or arch-v32)
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source arch/cris/arch/drivers/Kconfig
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endmenu
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@ -184,6 +189,10 @@ source "drivers/isdn/Kconfig"
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source "drivers/telephony/Kconfig"
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source "drivers/i2c/Kconfig"
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source "drivers/rtc/Kconfig"
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#
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# input before char - char/joystick depends on it. As does USB.
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#
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@ -198,6 +207,10 @@ source "fs/Kconfig"
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source "sound/Kconfig"
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source "drivers/pcmcia/Kconfig"
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source "drivers/pci/Kconfig"
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source "drivers/usb/Kconfig"
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source "kernel/Kconfig.instrumentation"
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@ -2,6 +2,7 @@ config ETRAX_ETHERNET
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bool "Ethernet support"
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depends on ETRAX_ARCH_V10
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select NET_ETHERNET
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select MII
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help
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This option enables the ETRAX 100LX built-in 10/100Mbit Ethernet
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controller.
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@ -500,9 +500,8 @@ _work_notifysig:
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;; deal with pending signals and notify-resume requests
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move.d $r9, $r10 ; do_notify_resume syscall/irq param
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moveq 0, $r11 ; oldset param - 0 in this case
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move.d $sp, $r12 ; the regs param
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move.d $r1, $r13 ; the thread_info_flags parameter
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move.d $sp, $r11 ; the regs param
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move.d $r1, $r12 ; the thread_info_flags parameter
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jsr do_notify_resume
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ba _Rexit
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@ -678,13 +677,19 @@ IRQ1_interrupt:
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push $r10 ; push orig_r10
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clear.d [$sp=$sp-4] ; frametype == 0, normal frame
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;; If there is a glitch on the NMI pin shorter than ~100ns
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;; (i.e. non-active by the time we get here) then the nmi_pin bit
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;; in R_IRQ_MASK0_RD will already be cleared. The watchdog_nmi bit
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;; is cleared by us however (when feeding the watchdog), which is why
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;; we use that bit to determine what brought us here.
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move.d [R_IRQ_MASK0_RD], $r1 ; External NMI or watchdog?
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and.d 0x80000000, $r1
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beq wdog
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and.d (1<<30), $r1
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bne wdog
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move.d $sp, $r10
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jsr handle_nmi
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setf m ; Enable NMI again
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retb ; Return from NMI
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ba _Rexit ; Return the standard way
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nop
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wdog:
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#if defined(CONFIG_ETRAX_WATCHDOG) && !defined(CONFIG_SVINTO_SIM)
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@ -775,22 +780,9 @@ multiple_interrupt:
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push $r10 ; push orig_r10
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clear.d [$sp=$sp-4] ; frametype == 0, normal frame
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moveq 2, $r2 ; first bit we care about is the timer0 irq
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move.d [R_VECT_MASK_RD], $r0; read the irq bits that triggered the multiple irq
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move.d $r0, [R_VECT_MASK_CLR] ; Block all active IRQs
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1:
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btst $r2, $r0 ; check for the irq given by bit r2
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bpl 2f
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move.d $r2, $r10 ; First argument to do_IRQ
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move.d $sp, $r11 ; second argument to do_IRQ
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jsr do_IRQ
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2:
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addq 1, $r2 ; next vector bit
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cmp.b 32, $r2
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bne 1b ; process all irq's up to and including number 31
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moveq 0, $r9 ; make ret_from_intr realise we came from an ir
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move.d $sp, $r10
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jsr do_multiple_IRQ
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move.d $r0, [R_VECT_MASK_SET] ; Unblock all the IRQs
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jump ret_from_intr
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do_sigtrap:
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@ -837,6 +829,13 @@ _ugdb_handle_breakpoint:
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ba do_sigtrap ; SIGTRAP the offending process.
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pop $dccr ; Restore dccr in delay slot.
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.global kernel_execve
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kernel_execve:
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move.d __NR_execve, $r9
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break 13
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ret
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nop
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.data
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hw_bp_trigs:
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@ -12,10 +12,16 @@
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*/
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#include <asm/irq.h>
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#include <asm/current.h>
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#include <linux/irq.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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/* From kgdb.c. */
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extern void kgdb_init(void);
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extern void breakpoint(void);
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#define mask_irq(irq_nr) (*R_VECT_MASK_CLR = 1 << (irq_nr));
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#define unmask_irq(irq_nr) (*R_VECT_MASK_SET = 1 << (irq_nr));
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@ -75,8 +81,8 @@ BUILD_IRQ(12, 0x1000)
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BUILD_IRQ(13, 0x2000)
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void mmu_bus_fault(void); /* IRQ 14 is the bus fault interrupt */
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void multiple_interrupt(void); /* IRQ 15 is the multiple IRQ interrupt */
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BUILD_IRQ(16, 0x10000)
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BUILD_IRQ(17, 0x20000)
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BUILD_IRQ(16, 0x10000 | 0x20000) /* ethernet tx interrupt needs to block rx */
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BUILD_IRQ(17, 0x20000 | 0x10000) /* ...and vice versa */
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BUILD_IRQ(18, 0x40000)
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BUILD_IRQ(19, 0x80000)
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BUILD_IRQ(20, 0x100000)
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@ -147,6 +153,55 @@ void system_call(void); /* from entry.S */
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void do_sigtrap(void); /* from entry.S */
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void gdb_handle_breakpoint(void); /* from entry.S */
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extern void do_IRQ(int irq, struct pt_regs * regs);
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/* Handle multiple IRQs */
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void do_multiple_IRQ(struct pt_regs* regs)
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{
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int bit;
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unsigned masked;
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unsigned mask;
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unsigned ethmask = 0;
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/* Get interrupts to mask and handle */
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mask = masked = *R_VECT_MASK_RD;
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/* Never mask timer IRQ */
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mask &= ~(IO_MASK(R_VECT_MASK_RD, timer0));
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/*
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* If either ethernet interrupt (rx or tx) is active then block
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* the other one too. Unblock afterwards also.
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*/
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if (mask &
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(IO_STATE(R_VECT_MASK_RD, dma0, active) |
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IO_STATE(R_VECT_MASK_RD, dma1, active))) {
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ethmask = (IO_MASK(R_VECT_MASK_RD, dma0) |
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IO_MASK(R_VECT_MASK_RD, dma1));
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}
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/* Block them */
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*R_VECT_MASK_CLR = (mask | ethmask);
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/* An extra irq_enter here to prevent softIRQs to run after
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* each do_IRQ. This will decrease the interrupt latency.
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*/
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irq_enter();
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/* Handle all IRQs */
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for (bit = 2; bit < 32; bit++) {
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if (masked & (1 << bit)) {
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do_IRQ(bit, regs);
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}
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}
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/* This irq_exit() will trigger the soft IRQs. */
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irq_exit();
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/* Unblock the IRQs again */
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*R_VECT_MASK_SET = (masked | ethmask);
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}
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/* init_IRQ() is called by start_kernel and is responsible for fixing IRQ masks and
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setting the irq vector table.
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*/
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@ -195,6 +195,11 @@ EXPORT_SYMBOL(enable_hlt);
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*/
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void (*pm_idle)(void);
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extern void default_idle(void);
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void (*pm_power_off)(void);
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EXPORT_SYMBOL(pm_power_off);
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/*
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* The idle thread. There's no useful work to be
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* done, so just try to conserve power and have a
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@ -81,13 +81,13 @@
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/* notification of userspace execution resumption
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* - triggered by current->work.notify_resume
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*/
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extern int do_signal(int canrestart, sigset_t *oldset, struct pt_regs *regs);
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extern int do_signal(int canrestart, struct pt_regs *regs);
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void do_notify_resume(int canrestart, sigset_t *oldset, struct pt_regs *regs,
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void do_notify_resume(int canrestart, struct pt_regs *regs,
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__u32 thread_info_flags )
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{
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/* deal with pending signal delivery */
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if (thread_info_flags & _TIF_SIGPENDING)
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do_signal(canrestart,oldset,regs);
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do_signal(canrestart,regs);
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}
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@ -32,6 +32,7 @@ struct thread_info {
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unsigned long flags; /* low level flags */
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__u32 cpu; /* current CPU */
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int preempt_count; /* 0 => preemptable, <0 => BUG */
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__u32 tls; /* TLS for this thread */
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mm_segment_t addr_limit; /* thread address space:
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0-0xBFFFFFFF for user-thead
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@ -79,14 +80,18 @@ struct thread_info {
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* - other flags in MSW
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*/
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#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
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#define TIF_SIGPENDING 1 /* signal pending */
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#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
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#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
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#define TIF_SIGPENDING 2 /* signal pending */
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#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
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#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */
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#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
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#define TIF_MEMDIE 17
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#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
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#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
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#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
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#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
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#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
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#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
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#define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */
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