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Dump machine registers in OpenSBI

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This commit is contained in:
Rodrigo Arias Mallo 2024-08-21 07:13:45 +02:00
parent 62bd702929
commit 1419473a08
3 changed files with 76 additions and 0 deletions
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56
JOURNAL.md
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@ -3531,3 +3531,59 @@ address:
Let's revert the stvec to its original value and try again and see if we can see
the delegation properly being handed to the supervisor handler.
It continues to do the same trap in machine mode, rather than handing the
interrupt over to supervisor.
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 <-------- now stvec is left as-is
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
<i
sbi_trap_error: hart0: trap0: unhandled local interrupt (error -1000)
sbi_trap_error: hart0: trap0: mcause=0x800000000000000b mtval=0x0000000000000000
sbi_trap_error: hart0: trap0: mepc=0x00000000af71df40 mstatus=0x8000000a00006802
sbi_trap_error: hart0: trap0: ra=0x00000000af71df24 sp=0x00000000aeed2b00
sbi_trap_error: hart0: trap0: gp=0x00000000aeed2dd0 tp=0x0000000000000000
sbi_trap_error: hart0: trap0: s0=0x00000000af7cca38 s1=0x0000000000000000
sbi_trap_error: hart0: trap0: a0=0x0000000000000000 a1=0x0000000000000002
sbi_trap_error: hart0: trap0: a2=0x0000000000000008 a3=0x0000000000000004
sbi_trap_error: hart0: trap0: a4=0x0000000000000001 a5=0x0000000000000001
sbi_trap_error: hart0: trap0: a6=0x0000000000000008 a7=0x00000000af794b08
sbi_trap_error: hart0: trap0: s2=0x0000000000000000 s3=0x00000000aeed4b90
sbi_trap_error: hart0: trap0: s4=0x0000000000000003 s5=0x00000000af7f7754
sbi_trap_error: hart0: trap0: s6=0x0000000000000000 s7=0x0000000000000000
sbi_trap_error: hart0: trap0: s8=0x0000000000000000 s9=0x0000000000000000
sbi_trap_error: hart0: trap0: s10=0x00000000aeed4bc0 s11=0x0000000000000000
sbi_trap_error: hart0: trap0: t0=0x00000000aeed2ac0 t1=0x0000000000000039
sbi_trap_error: hart0: trap0: t2=0x3b3d74696e695f64 t3=0x0000000000000010
sbi_trap_error: hart0: trap0: t4=0x0000000000000000 t5=0x61745f746f6f627b
sbi_trap_error: hart0: trap0: t6=0x00000000aeed2aa0
Let's dump the machine registers too.

1
lagarto-ox.nix
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@ -333,6 +333,7 @@
patches = [
./opensbi-timer-debug.patch
./opensbi-enable-meip.patch
./opensbi-dump-mregs.patch
#./opensbi-dont-delegate.patch
#./ox-alveo-platform-plic.patch
];

19
opensbi-dump-mregs.patch Normal file
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@ -0,0 +1,19 @@
diff --git a/lib/sbi/sbi_hart.c b/lib/sbi/sbi_hart.c
index c366701..1ef6145 100644
--- a/lib/sbi/sbi_hart.c
+++ b/lib/sbi/sbi_hart.c
@@ -241,6 +241,14 @@ void sbi_hart_delegation_dump(struct sbi_scratch *scratch,
prefix, suffix, csr_read(CSR_MIDELEG));
sbi_printf("%sMEDELEG%s: 0x%" PRILX "\n",
prefix, suffix, csr_read(CSR_MEDELEG));
+ sbi_printf("%sMTVEC%s : 0x%" PRILX "\n",
+ prefix, suffix, csr_read(CSR_MTVEC));
+ sbi_printf("%sMIE%s : 0x%" PRILX "\n",
+ prefix, suffix, csr_read(CSR_MIE));
+ sbi_printf("%sMIP%s : 0x%" PRILX "\n",
+ prefix, suffix, csr_read(CSR_MIP));
+ sbi_printf("%sMSTATUS%s: 0x%" PRILX "\n",
+ prefix, suffix, csr_read(CSR_MSTATUS));
}
unsigned int sbi_hart_mhpm_mask(struct sbi_scratch *scratch)