/* Boot.S: boot loader for Siemens DVB-S card Copyright (C) 2001 Convergence integrated media GmbH Written by Ralph Metzler Copyright (C) 2006 Matthieu CASTET 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 the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. */ /* check AV711x_3_1.pdf for some hardware infos build it with : $ cc -mbig-endian -c Boot.S $ ld -Ttext 0x2c000000 -EB -o Boot Boot.o $ objcopy -Obinary Boot */ .text .align .globl _start _start: b reset // reset vector movs pc, r14 // undefined subs pc, r14, #4 // SWI subs pc, r14, #4 // prefetch abort subs pc, r14, #8 // data abort subs pc, r14, #4 // reserved subs pc, r14, #4 // IRQ subs pc, r14, #4 // FIQ .word tbl // table needed by firmware ROM tbl: .word (endtbl - tbl) .word 0 .word conf endtbl: .word 0 conf: .word 0xa5a55a5a .word 0x001f1555 .word 0x00000009 reset: ldr r13, buffer ldr r4, flag mov r0, #0 str r0, [r4] str r0, [r4, #4] ldr r1, wait_address ldr r2, flag_address ldr r3, sram copycode: // copy the code HW Sram ldmia r1!, {r5-r12} stmia r3!, {r5-r12} cmp r1, r2 ble copycode ldr pc, sram // jump to the copied code wait: ldrh r1, [r4] // wait for flag!=0 cmp r1, #0 beq wait mov r1, r13 // buffer address ldr r3, [r4,#4] // destaddr ldrh r2, [r4,#2] // get segment length add r2, r2, #63 // round length to next 64 bytes movs r2, r2, lsr #6 // and divide by 64 moveq r0, #2 // if 0, set flag to 2, else signal strh r0, [r4] // that buffer is accepted by setting to 0 beq wait copyloop: ldmia r1!, {r5-r12} stmia r3!, {r5-r12} ldmia r1!, {r5-r12} stmia r3!, {r5-r12} subs r2, r2, #1 bne copyloop eor r13, r13, #0x1400 // switch to other buffer b wait // flag is stored at 0x2c0003f8, length at 0x2c0003fa, // destaddr at 0x2c0003fc flag: .word 0x2c0003f8 // buffer 1 is at 0x2c000400, buffer 2 at 0x2c001000 buffer: .word 0x2c000400 sram: .word 0x9e000800 wait_address: .word wait flag_address: .word flag commit/net?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>net/l3mdev/l3mdev.c
diff options
context:
space:
mode:
authorBjorn Helgaas <bhelgaas@google.com>2017-01-27 15:00:45 -0600
committerBjorn Helgaas <bhelgaas@google.com>2017-01-27 15:00:45 -0600
commit030305d69fc6963c16003f50d7e8d74b02d0a143 (patch)
tree363a4e34d199178769b7e7eeb26ea2620a55847b /net/l3mdev/l3mdev.c
parent4d191b1b63c209e37bf27938ef365244d3c41084 (diff)
PCI/ASPM: Handle PCI-to-PCIe bridges as roots of PCIe hierarchies
In a struct pcie_link_state, link->root points to the pcie_link_state of the root of the PCIe hierarchy. For the topmost link, this points to itself (link->root = link). For others, we copy the pointer from the parent (link->root = link->parent->root). Previously we recognized that Root Ports originated PCIe hierarchies, but we treated PCI/PCI-X to PCIe Bridges as being in the middle of the hierarchy, and when we tried to copy the pointer from link->parent->root, there was no parent, and we dereferenced a NULL pointer: BUG: unable to handle kernel NULL pointer dereference at 0000000000000090 IP: [<ffffffff9e424350>] pcie_aspm_init_link_state+0x170/0x820 Recognize that PCI/PCI-X to PCIe Bridges originate PCIe hierarchies just like Root Ports do, so link->root for these devices should also point to itself. Fixes: 51ebfc92b72b ("PCI: Enumerate switches below PCI-to-PCIe bridges") Link: https://bugzilla.kernel.org/show_bug.cgi?id=193411 Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1022181 Tested-by: lists@ssl-mail.com Tested-by: Jayachandran C. <jnair@caviumnetworks.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org # v4.2+
Diffstat (limited to 'net/l3mdev/l3mdev.c')