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PCI interrupts work

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This commit is contained in:
Ciro Santilli
2017-06-17 22:58:00 +01:00
parent 4b7ce59e45
commit de6c179fc0
2 changed files with 50 additions and 12 deletions
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15
rootfs_overlay/pci.sh
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@@ -6,11 +6,11 @@ set -ex
insmod /pci.ko
/mknoddev.sh pci
# Identifiction.
# Identifiction: just returns some fixed magic bytes.
dd bs=4 status=none if=/dev/lkmc_pci count=1 skip=0 | od -An -t x1
# => 010000ed
# Negator.
# Negator. Sanity check that the hardware is getting updated.
dd bs=4 status=none if=/dev/lkmc_pci count=1 skip=1 | od -An -t x1
printf '\xF0\xF0\xF0\xF0' | dd bs=4 status=none of=/dev/lkmc_pci count=1 seek=1
dd bs=4 status=none if=/dev/lkmc_pci count=1 skip=1 | od -An -t x1
@@ -18,13 +18,20 @@ dd bs=4 status=none if=/dev/lkmc_pci count=1 skip=1 | od -An -t x1
# Factorial calculator.
# factorial(0xC) = 0x1c8cfc00
printf '\x00\x00\x00\x0C' | dd bs=4 status=none of=/dev/lkmc_pci count=1 seek=2
printf '\x00\x00\x00\x00' | dd bs=4 status=none of=/dev/lkmc_pci count=1 seek=8
printf '\x0C\x00\x00\x00' | dd bs=4 status=none of=/dev/lkmc_pci count=1 seek=2
sleep 1
dd bs=4 status=none if=/dev/lkmc_pci count=1 skip=2 | od -An -t x1
dd bs=4 status=none if=/dev/lkmc_pci count=1 skip=8 | od -An -t x1
# => 1c8cfc00
# Manual IRQ raising.
printf '\x04\x03\x02\x01' | dd bs=4 status=none of=/dev/lkmc_pci count=1 seek=24
# => interrupt
sleep 1
printf '\x08\x07\x06\x05' | dd bs=4 status=none of=/dev/lkmc_pci count=1 seek=24
# => interrupt
sleep 1
# Teardown.
rm /dev/lkmc_pci
rmmod pci