diff options
| author | Simon Glass <sjg@chromium.org> | 2015-08-13 10:36:17 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-08-14 10:00:51 -0600 |
| commit | 590870e7e8919bca7adfd97069ac5b2a924b3151 (patch) | |
| tree | c790ad3ef04421f0ee686d6395df1d82fe16e6c8 /doc/README.x86 | |
| parent | ef910819c5a020e96c444d1e73eac917d394456b (diff) | |
x86: Add a simple interrupt script to the README
It is a bit tedious to figure out the interrupt configuration for a new
x86 platform. Add a script which can do this, based on the output of
'pci long'. This may be helpful in some cases.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'doc/README.x86')
| -rw-r--r-- | doc/README.x86 | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/doc/README.x86 b/doc/README.x86 index 9012541cad7..e7dc090e76b 100644 --- a/doc/README.x86 +++ b/doc/README.x86 @@ -718,6 +718,21 @@ allocation and assignment will be done by U-Boot automatically. Now you can enable CONFIG_GENERATE_PIRQ_TABLE for testing Linux kernel using i8259 PIC and CONFIG_GENERATE_MP_TABLE for testing Linux kernel using local APIC and I/O APIC. +This script might be useful. If you feed it the output of 'pci long' from +U-Boot then it will generate a device tree fragment with the interrupt +configuration for each device (note it needs gawk 4.0.0): + + $ cat console_output |awk '/PCI/ {device=$4} /interrupt line/ {line=$4} \ + /interrupt pin/ {pin = $4; if (pin != "0x00" && pin != "0xff") \ + {patsplit(device, bdf, "[0-9a-f]+"); \ + printf "PCI_BDF(%d, %d, %d) INT%c PIRQ%c\n", strtonum("0x" bdf[1]), \ + strtonum("0x" bdf[2]), bdf[3], strtonum(pin) + 64, 64 + strtonum(pin)}}' + +Example output: + PCI_BDF(0, 2, 0) INTA PIRQA + PCI_BDF(0, 3, 0) INTA PIRQA +... + TODO List --------- - Audio |