diff options
| -rw-r--r-- | usertests.c | 32 | ||||
| -rw-r--r-- | vm.c | 1 |
2 files changed, 33 insertions, 0 deletions
diff --git a/usertests.c b/usertests.c index 458f8ed..93f656b 100644 --- a/usertests.c +++ b/usertests.c @@ -1695,6 +1695,35 @@ fsfull() printf(1, "fsfull test finished\n"); } +void +uio() +{ + #define RTC_ADDR 0x70 + #define RTC_DATA 0x71 + + ushort port = 0; + uchar val = 0; + int pid; + + printf(1, "uio test\n"); + pid = fork(); + if(pid == 0){ + port = RTC_ADDR; + val = 0x09; /* year */ + /* http://wiki.osdev.org/Inline_Assembly/Examples */ + asm volatile("outb %0,%1"::"a"(val), "d" (port)); + port = RTC_DATA; + asm volatile("inb %1,%0" : "=a" (val) : "d" (port)); + printf(1, "uio: uio succeeded; test FAILED\n"); + exit(); + } else if(pid < 0){ + printf (1, "fork failed\n"); + exit(); + } + wait(); + printf(1, "uio test done\n"); +} + unsigned long randstate = 1; unsigned int rand() @@ -1751,6 +1780,9 @@ main(int argc, char *argv[]) iref(); forktest(); bigdir(); // slow + + uio(); + exectest(); exit(); @@ -168,6 +168,7 @@ switchuvm(struct proc *p) cpu->gdt[SEG_TSS].s = 0; cpu->ts.ss0 = SEG_KDATA << 3; cpu->ts.esp0 = (uint)proc->kstack + KSTACKSIZE; + cpu->ts.iomb = (ushort) 0xFFFF; // forbid I/O instructions from user space ltr(SEG_TSS << 3); if(p->pgdir == 0) panic("switchuvm: no pgdir"); |