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Added do_mapdma.

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This commit is contained in:
Philip Homburg 2008-02-22 10:51:37 +00:00
parent 594035f13c
commit 2679321ba0
2 changed files with 49 additions and 1 deletions
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6
kernel/system/Makefile
View file

@ -54,7 +54,8 @@ OBJECTS = \
$(SYSTEM)(do_vm_setbuf.o) \
$(SYSTEM)(do_sprofile.o) \
$(SYSTEM)(do_cprofile.o) \
$(SYSTEM)(do_profbuf.o)
$(SYSTEM)(do_profbuf.o) \
$(SYSTEM)(do_mapdma.o)
build $(SYSTEM): $(OBJECTS)
aal cr $@ *.o
@ -168,3 +169,6 @@ $(SYSTEM)(do_cprofile.o): do_cprofile.c
$(SYSTEM)(do_profbuf.o): do_profbuf.c
$(CC) do_profbuf.c
$(SYSTEM)(do_mapdma.o): do_mapdma.c
$(CC) do_mapdma.c

44
kernel/system/do_mapdma.c Normal file
View file

@ -0,0 +1,44 @@
/* The kernel call implemented in this file:
* m_type: SYS_MAPDMA
*
* The parameters for this kernel call are:
* m5_l1: CP_SRC_ADDR (virtual address)
* m5_l3: CP_NR_BYTES (size of datastructure)
*/
#include "../system.h"
/*==========================================================================*
* do_mapdma *
*==========================================================================*/
PUBLIC int do_mapdma(m_ptr)
register message *m_ptr; /* pointer to request message */
{
int r;
endpoint_t proc_e;
int proc_p;
vir_bytes base, size;
phys_bytes phys_base;
struct proc *proc;
message m;
proc_e = m_ptr->CP_SRC_ENDPT;
base= m_ptr->CP_SRC_ADDR;
size= m_ptr->CP_NR_BYTES;
if (!isokendpt(proc_e, &proc_p))
return(EINVAL);
proc = proc_addr(proc_p);
phys_base= umap_local(proc, D, base, size);
if (!phys_base)
{
kprintf("do_mapdma: umap_local failed\n");
return EFAULT;
}
m_ptr->CP_DST_ADDR = phys_base;
return OK;
}