Initial code, walking device-tree to setup chunk bit-vector,
and allocating RMA memory for Dom0 using 1st available chunk.
note - 'diff' parms are probably not standard.
--- setup.c.cow 2006-07-07 17:34:16.000000000 -0400
+++ setup.c 2006-07-24 16:03:34.000000000 -0400
@@ -44,6 +44,12 @@
#include "of-devtree.h"
#define DEBUG
+
+#define CHUNK_SIZE 0x4000000
+/* track available 64mb physical memory chunks */
+/* 64 chunks cover 4gb; this vector tracks 16gb ***FIXME */
+unsigned long chunk_vector[4] = {0,0,0,0};
+
unsigned long xenheap_phys_end;
/* opt_noht: If true, Hyperthreading is ignored. */
@@ -170,6 +176,11 @@
ulong bytes = 0;
ulong freemem = (ulong)_end;
ulong oftree_end;
+ ulong nr;
+
+ ofdn_t n;
+ int i, p_len;
+ ulong membuf[16], memstart, memlen;
memcpy(0, exception_vectors, exception_vectors_end - exception_vectors);
synchronize_caches(0, exception_vectors_end - exception_vectors);
@@ -265,6 +276,33 @@
ofd_walk((void *)oftree, OFD_ROOT, ofd_dump_props, OFD_DUMP_ALL);
#endif
+ n = ofd_node_find((void *)oftree, "/memory");
+ if (n <= 0){
+ printk("ofd_node_find(oftree, '/memory') failed\n");
+ } else {
+ p_len = ofd_getprop((void *)oftree, n, "reg", membuf, sizeof (membuf));
+ if (p_len <= 0){
+ printk("ofd_getprop(oftree, n, 'reg', ... failed\n");
+ } else {
+ printk("/memory/reg 0x%x\n", p_len);
+ printk("0x%016lx 0x%016lx\n", membuf[0], membuf[1]);
+ printk("0x%016lx 0x%016lx\n", membuf[2], membuf[3]);
+ }
+ }
+
+ /* 1st chunk goes to hypervisor; remaining chunks to guests */
+ /* (need to verify that eomem can be contained within chunk_vector) */
+ for (i = 0; i < (p_len / sizeof(ulong)); i += 2){
+ memstart = membuf[i]; memlen = membuf[i+1];
+ for (nr = memstart/CHUNK_SIZE; nr < ((memstart + memlen)/CHUNK_SIZE);
nr++) {
+ __set_bit(nr, chunk_vector);
+ }
+ }
+ __clear_bit(0, chunk_vector);
+
+ printk("chunk_vector: 0x%016lx 0x%016lx 0x%016lx 0x%016lx\n",
+ chunk_vector[0], chunk_vector[1], chunk_vector[2], chunk_vector[3]);
+
/* mark all memory from modules onward as unused */
init_boot_pages(freemem, eomem);
--- domain.c.cow 2006-07-07 17:34:16.000000000 -0400
+++ domain.c 2006-07-18 15:35:13.000000000 -0400
@@ -31,6 +31,9 @@
#include <asm/current.h>
#include <asm/hcalls.h>
+#define CHUNK_SIZE 0x4000000
+extern unsigned long chunk_vector[4];
+
extern void idle_loop(void);
#define next_arg(fmt, args) ({ \
@@ -74,6 +77,8 @@
int arch_domain_create(struct domain *d)
{
+ ulong avail_chunk;
+
if (d->domain_id == IDLE_DOMAIN_ID) {
d->shared_info = (void *)alloc_xenheap_page();
clear_page(d->shared_info);
@@ -81,9 +86,28 @@
return 0;
}
+#if 0
/* XXX the hackage... hardcode 64M domains */
d->arch.rma_base = (64<<20) * (d->domain_id + 1);
- d->arch.rma_size = (64<<20);
+ d->arch.rma_size = (128<<20);
+#endif
+
+ do {
+ avail_chunk = find_first_bit(chunk_vector, sizeof(chunk_vector) * 8);
+ if ( avail_chunk >= sizeof(chunk_vector) * 8 ) {
+ printf("No memory available for domain\n");
+ machine_halt();
+ }
+
+ if ( test_and_clear_bit(avail_chunk, chunk_vector) ) {
+ d->arch.rma_base = CHUNK_SIZE * avail_chunk;
+ d->arch.rma_size = CHUNK_SIZE;
+ break;
+ }
+ } while ( 1 );
+
+ printk("chunk_vector: 0x%016lx 0x%016lx 0x%016lx 0x%016lx\n",
+ chunk_vector[0], chunk_vector[1], chunk_vector[2], chunk_vector[3]);
printk("clearing RMO: 0x%lx[0x%lx]\n", d->arch.rma_base, d->arch.rma_size);
memset((void*)d->arch.rma_base, 0, d->arch.rma_size);
--
_______________________________________________
Xen-ppc-devel mailing list
Xen-ppc-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-ppc-devel
|
Home