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Enable timer command in U-Boot

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Rodrigo Arias Mallo 2024-08-02 15:27:20 +02:00
parent 33fb07481a
commit 98f794e52d
2 changed files with 46 additions and 0 deletions
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45
JOURNAL.md
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@ -3365,3 +3365,48 @@ I don't see any message:
I made a small subcommand U-Boot "exception sregs" to be able to dump the I made a small subcommand U-Boot "exception sregs" to be able to dump the
supervisor registers, to check they have the proper values. supervisor registers, to check they have the proper values.
Boot HART MIDELEG : 0x0000000000000222
Boot HART MEDELEG : 0x000000000000b109
><E
><E<><Ed><Ee><Eb><Eu><Eg><E_><Eu><Ea><Er><Et><E>><E
><E><E>Core: 11 devices, 8 uclasses, devicetree: board
Loading Environment from nowhere... OK
In: serial,usbkbd
Out: serial,vidconsole
Err: serial,vidconsole
No working controllers found
Net: No ethernet found.
Working FDT set to c0000000
Hit any key to stop autoboot: 0
=> exception sregs
stvec : 0x00000000af6f4400
sie : 0x0000000000000000
sip : 0x0000000000000000
sstatus : 0x8000000200006000
=> exception enable
=> exception sregs
stvec : 0x00000000af6f4400
sie : 0x0000000000000222
sip : 0x0000000000000000
sstatus : 0x8000000200006002
=> mw 0x40014000 0xffffffff # Disable clock interrupt
=> md 0x40801000 1 # Show pending interrupts (should be 0x10)
40801000: 00000010 ....
=> mw 0x40802000 0x10 # Enable interrupt for source 4 (timer)
=> mw 0x40800010 0xff # Make source 4 priority large
=> md 0x40a00004 1 # Claim interrupt (should read 4)
40a00004: 00000004 ....
=> mw 0x40a00004 4 # Complete 4
=> md 0x40801000 1 # Show pending interrupts (should be 0x00)
40801000: 00000000 ....
=> mw 0x40014000 0x00000000 # Enable clock interrupt (should cause one)
=> md 0x40801000 1 # Show pending interrupts (should be 0x10)
40801000: 00000010 ....
=> exception sregs
stvec : 0x00000000af6f4400
sie : 0x0000000000000222
sip : 0x0000000000000200
sstatus : 0x8000000200006002
Now I can see the external interrupt in supervisor arriving to the SIP.

1
lagarto-ox.nix
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@ -247,6 +247,7 @@
CONFIG_TRACE_EARLY=y CONFIG_TRACE_EARLY=y
CONFIG_CMD_MEMTEST=y CONFIG_CMD_MEMTEST=y
CONFIG_CMD_EXCEPTION=y CONFIG_CMD_EXCEPTION=y
CONFIG_CMD_TIMER=y
'' ''
# # Enable debug logs # # Enable debug logs
# + # +