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| author | Christian Cunningham <cc@localhost> | 2022-02-01 19:39:36 -0700 |
|---|---|---|
| committer | Christian Cunningham <cc@localhost> | 2022-02-01 19:39:36 -0700 |
| commit | 98793badc1c1d3e4bfd735fdecd3d2d731701ab3 (patch) | |
| tree | 3406220e55b0e7cce3895817796f75bf754da6d9 /src/exceptions/svc.S | |
| parent | 33e35caf1104cdf5b8e1470112677f78b5e8dc59 (diff) | |
Syscall to get timer value
Diffstat (limited to 'src/exceptions/svc.S')
| -rw-r--r-- | src/exceptions/svc.S | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/exceptions/svc.S b/src/exceptions/svc.S index d1fcbc0..51c6479 100644 --- a/src/exceptions/svc.S +++ b/src/exceptions/svc.S @@ -18,6 +18,12 @@ svc_000000: cps #0x13 b svc_exit svc_000001: + mov r2, #0x3004 + movt r2, #0x3F00 + ldr r0, [r2, #4] // <- SYS_TIMER_CLO + ldr r1, [r2, #0] // <- SYS_TIMER_CHI + str r0, [sp] // Return value + str r1, [sp, #4] // Return value hi b svc_exit svc_000002: ldmfd sp!, {r0-r12,lr} |