Hello to all,
I'm working on L4 fiasco. In that I want to read the virtual hardware devies. for tha I'm running the code from * l4/pkg/example/sys/ux-vhw/main.c
*** * 10 #include <l4/sys/ipc.h> 11 #include <l4/sys/vhw.h> 12 #include <l4/util/util.h> 13 #include <l4/util/kip.h> 14 #include <l4/re/env.h> 15 16 #include <stdlib.h> 17 #include <stdio.h> 18 19 static void print_entry(struct l4_vhw_entry *e) 20 { 21 printf("type: %d mem start: %08lx end: %08lx\n" 22 "irq: %d pid %d\n", 23 e->type, e->mem_start, e->mem_size, 24 e->irq_no, e->provider_pid); 25 } 26 27 int main(void) 28 { 29 l4_kernel_info_t *kip = l4re_kip(); 30 struct l4_vhw_descriptor *vhw; 31 int i; 32 33 if (!kip) 34 { 35 36 printf("KIP not available!\n"); 37 return 1; 38 } 39 40 vhw = l4_vhw_get(kip); 41 42 if(vhw) 43 { 44 printf("kip at %p, vhw at %p\n", kip, vhw); 45 printf("magic: %08x, version: %08x, count: %02d\n", 46 vhw->magic, vhw->version, vhw->count); 47 48 for (i = 0; i < vhw->count; i++) 49 print_entry(l4_vhw_get_entry(vhw, i)); 50 } 51 return 0; 52 }**
*In the above code at *line no 40* after *calling inline function l4_vhw_get(kip)* I'm getting *vhw=NULL. *and the definition of inline function is from* l4sys/include/vhw.h *is as follows*
80 enum { 81 L4_VHW_MAGIC = 0x56687765, 82 }; 83 84 static inline struct l4_vhw_descriptor * 85 l4_vhw_get(l4_kernel_info_t *kip) L4_NOTHROW 86 { 87 struct l4_vhw_descriptor *v 88 = (struct l4_vhw_descriptor *)(((unsigned long)kip) + kip->vhw_offset); 89 90 if (v->magic == L4_VHW_MAGIC) 91 return v; 92 93 return NULL; 94 }
*Here* at line no 90, the v->magic *is having a value of* 0x4BE6344C *which is not equal to* L4_VHW_MAGIC
*My qestion is why I'm getting different magic value Instead of 0x56687765, and how can I get correct magic value*. *If there are no virtual hardware device how can i create and integrate into my system........* * * * * *Thanks, Raja Sekhar