lkml.org 
[lkml]   [2001]   [Feb]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patches in this message
/
Date
From
Subject[patch] ruffian IRQs, OSF syscalls dedugging fixes
- Don't trust IRQs assigned by ARC console on ruffian any more;
use interrupt routing table provided by <kelvin@qantel.com> instead.
This fixes cards reporting bogus interrupt pin (ES1969).
- Disable debugging messages for OSF syscalls as potential source of
DoS attack. Besides, the same info can be obtained with `strace'.

Patches for 2.2 and 2.4 attached.

Ivan.

--- 2.2.18/arch/alpha/kernel/osf_sys.c Thu May 4 04:16:30 2000
+++ linux/arch/alpha/kernel/osf_sys.c Mon Feb 5 13:57:18 2001
@@ -78,8 +78,10 @@ asmlinkage int osf_set_program_attribute
mm = current->mm;
mm->end_code = bss_start + bss_len;
mm->brk = bss_start + bss_len;
+#if 0
printk("set_program_attributes(%lx %lx %lx %lx)\n",
text_start, text_len, bss_start, bss_len);
+#endif
unlock_kernel();
return 0;
}
--- 2.2.18/arch/alpha/kernel/traps.c Thu Jun 8 01:26:42 2000
+++ linux/arch/alpha/kernel/traps.c Mon Feb 5 13:59:10 2001
@@ -1086,7 +1086,9 @@ alpha_ni_syscall(unsigned long a0, unsig
{
/* We only get here for OSF system calls, minus #112;
the rest go to sys_ni_syscall. */
+#if 0
printk("<sc %ld(%lx,%lx,%lx)>", regs.r0, a0, a1, a2);
+#endif
return -ENOSYS;
}

--- 2.2.18/arch/alpha/kernel/sys_ruffian.c Sun Jan 10 06:08:27 1999
+++ linux/arch/alpha/kernel/sys_ruffian.c Mon Feb 5 14:25:10 2001
@@ -163,16 +163,91 @@ ruffian_init_irq(void)
enable_irq(2); /* enable 2nd PIC cascade */
}

+/*
+ * Interrupt routing:
+ *
+ * Primary bus
+ * IdSel INTA INTB INTC INTD
+ * 21052 13 - - - -
+ * SIO 14 23 - - -
+ * 21143 15 44 - - -
+ * Slot 0 17 43 42 41 40
+ *
+ * Secondary bus
+ * IdSel INTA INTB INTC INTD
+ * Slot 0 8 (18) 19 18 17 16
+ * Slot 1 9 (19) 31 30 29 28
+ * Slot 2 10 (20) 27 26 25 24
+ * Slot 3 11 (21) 39 38 37 36
+ * Slot 4 12 (22) 35 34 33 32
+ * 53c875 13 (23) 20 - - -
+ *
+ */
+
+static int __init
+ruffian_map_irq(struct pci_dev *dev, int slot, int pin)
+{
+ static char irq_tab[11][5] __initdata = {
+ /*INT INTA INTB INTC INTD */
+ {-1, -1, -1, -1, -1}, /* IdSel 13, 21052 */
+ {-1, -1, -1, -1, -1}, /* IdSel 14, SIO */
+ {44, 44, 44, 44, 44}, /* IdSel 15, 21143 */
+ {-1, -1, -1, -1, -1}, /* IdSel 16, none */
+ {43, 43, 42, 41, 40}, /* IdSel 17, 64-bit slot */
+ /* the next 6 are actually on PCI bus 1, across the bridge */
+ {19, 19, 18, 17, 16}, /* IdSel 8, slot 0 */
+ {31, 31, 30, 29, 28}, /* IdSel 9, slot 1 */
+ {27, 27, 26, 25, 24}, /* IdSel 10, slot 2 */
+ {39, 39, 38, 37, 36}, /* IdSel 11, slot 3 */
+ {35, 35, 34, 33, 32}, /* IdSel 12, slot 4 */
+ {20, 20, 20, 20, 20}, /* IdSel 13, 53c875 */
+ };
+ const long min_idsel = 13, max_idsel = 23, irqs_per_slot = 5;
+ return COMMON_TABLE_LOOKUP;
+}
+
+static int __init
+ruffian_swizzle(struct pci_dev *dev, int *pinp)
+{
+ int slot, pin = *pinp;
+
+ if (dev->bus->number == 0) {
+ slot = PCI_SLOT(dev->devfn);
+ }
+ /* Check for the built-in bridge. */
+ else if (PCI_SLOT(dev->bus->self->devfn) == 13) {
+ slot = PCI_SLOT(dev->devfn) + 10;
+ }
+ else
+ {
+ /* Must be a card-based bridge. */
+ do {
+ if (PCI_SLOT(dev->bus->self->devfn) == 13) {
+ slot = PCI_SLOT(dev->devfn) + 10;
+ break;
+ }
+ pin = bridge_swizzle(pin, PCI_SLOT(dev->devfn));
+
+ /* Move up the chain of bridges. */
+ dev = dev->bus->self;
+ /* Slot of the next bridge. */
+ slot = PCI_SLOT(dev->devfn);
+ } while (dev->bus->self);
+ }
+ *pinp = pin;
+ return slot;
+}

/*
* For RUFFIAN, we do not want to make any modifications to the PCI
- * setup. But we may need to do some kind of init.
+ * setup, except IRQ assignment. But we may need to do some kind of init.
*/

static void __init
ruffian_pci_fixup(void)
{
/* layout_all_busses(DEFAULT_IO_BASE, DEFAULT_MEM_BASE); */
+ common_pci_fixup(ruffian_map_irq, ruffian_swizzle);
}

diff -ur 2.4.1/arch/alpha/kernel/osf_sys.c linux/arch/alpha/kernel/osf_sys.c
--- 2.4.1/arch/alpha/kernel/osf_sys.c Thu Jul 6 17:51:26 2000
+++ linux/arch/alpha/kernel/osf_sys.c Thu Jul 6 11:58:55 2000
@@ -74,8 +74,10 @@
mm = current->mm;
mm->end_code = bss_start + bss_len;
mm->brk = bss_start + bss_len;
+#if 0
printk("set_program_attributes(%lx %lx %lx %lx)\n",
text_start, text_len, bss_start, bss_len);
+#endif
unlock_kernel();
return 0;
}
diff -ur 2.4.1/arch/alpha/kernel/traps.c linux/arch/alpha/kernel/traps.c
--- 2.4.1/arch/alpha/kernel/traps.c Tue Jun 20 04:59:33 2000
+++ linux/arch/alpha/kernel/traps.c Thu Jul 6 11:58:55 2000
@@ -1093,7 +1093,9 @@
{
/* We only get here for OSF system calls, minus #112;
the rest go to sys_ni_syscall. */
+#if 0
printk("<sc %ld(%lx,%lx,%lx)>", regs.r0, a0, a1, a2);
+#endif
return -ENOSYS;
}

diff -ur 2.4.1/arch/alpha/kernel/sys_ruffian.c linux/arch/alpha/kernel/sys_ruffian.c
--- 2.4.1/arch/alpha/kernel/sys_ruffian.c Tue Nov 28 04:50:12 2000
+++ linux/arch/alpha/kernel/sys_ruffian.c Mon Feb 5 13:43:37 2001
@@ -92,14 +92,80 @@
#endif
}

+/*
+ * Interrupt routing:
+ *
+ * Primary bus
+ * IdSel INTA INTB INTC INTD
+ * 21052 13 - - - -
+ * SIO 14 23 - - -
+ * 21143 15 44 - - -
+ * Slot 0 17 43 42 41 40
+ *
+ * Secondary bus
+ * IdSel INTA INTB INTC INTD
+ * Slot 0 8 (18) 19 18 17 16
+ * Slot 1 9 (19) 31 30 29 28
+ * Slot 2 10 (20) 27 26 25 24
+ * Slot 3 11 (21) 39 38 37 36
+ * Slot 4 12 (22) 35 34 33 32
+ * 53c875 13 (23) 20 - - -
+ *
+ */
+
static int __init
ruffian_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
{
- /* We don't know anything about the PCI routing, so leave
- the IRQ unchanged. */
- return dev->irq;
+ static char irq_tab[11][5] __initdata = {
+ /*INT INTA INTB INTC INTD */
+ {-1, -1, -1, -1, -1}, /* IdSel 13, 21052 */
+ {-1, -1, -1, -1, -1}, /* IdSel 14, SIO */
+ {44, 44, 44, 44, 44}, /* IdSel 15, 21143 */
+ {-1, -1, -1, -1, -1}, /* IdSel 16, none */
+ {43, 43, 42, 41, 40}, /* IdSel 17, 64-bit slot */
+ /* the next 6 are actually on PCI bus 1, across the bridge */
+ {19, 19, 18, 17, 16}, /* IdSel 8, slot 0 */
+ {31, 31, 30, 29, 28}, /* IdSel 9, slot 1 */
+ {27, 27, 26, 25, 24}, /* IdSel 10, slot 2 */
+ {39, 39, 38, 37, 36}, /* IdSel 11, slot 3 */
+ {35, 35, 34, 33, 32}, /* IdSel 12, slot 4 */
+ {20, 20, 20, 20, 20}, /* IdSel 13, 53c875 */
+ };
+ const long min_idsel = 13, max_idsel = 23, irqs_per_slot = 5;
+ return COMMON_TABLE_LOOKUP;
}

+static u8 __init
+ruffian_swizzle(struct pci_dev *dev, u8 *pinp)
+{
+ int slot, pin = *pinp;
+
+ if (dev->bus->number == 0) {
+ slot = PCI_SLOT(dev->devfn);
+ }
+ /* Check for the built-in bridge. */
+ else if (PCI_SLOT(dev->bus->self->devfn) == 13) {
+ slot = PCI_SLOT(dev->devfn) + 10;
+ }
+ else
+ {
+ /* Must be a card-based bridge. */
+ do {
+ if (PCI_SLOT(dev->bus->self->devfn) == 13) {
+ slot = PCI_SLOT(dev->devfn) + 10;
+ break;
+ }
+ pin = bridge_swizzle(pin, PCI_SLOT(dev->devfn));
+
+ /* Move up the chain of bridges. */
+ dev = dev->bus->self;
+ /* Slot of the next bridge. */
+ slot = PCI_SLOT(dev->devfn);
+ } while (dev->bus->self);
+ }
+ *pinp = pin;
+ return slot;
+}

#ifdef BUILDING_FOR_MILO
/*
@@ -164,6 +230,6 @@
init_pci: cia_init_pci,
kill_arch: ruffian_kill_arch,
pci_map_irq: ruffian_map_irq,
- pci_swizzle: common_swizzle,
+ pci_swizzle: ruffian_swizzle,
};
ALIAS_MV(ruffian)
\
 
 \ /
  Last update: 2005-03-22 13:04    [W:0.062 / U:4.508 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site