void
bare_mem_regions(platform_t plat, struct mem_region **phys, int *physsz,
struct mem_region **avail, int *availsz)
{
uint32_t memsize;
int i, rv;
rv = fdt_get_mem_regions(avail_regions, availsz, &memsize);
if (rv != 0)
return;
for (i = 0; i < *availsz; i++) {
if (avail_regions[i].mr_start < 1048576) {
avail_regions[i].mr_size =
avail_regions[i].mr_size -
(1048576 - avail_regions[i].mr_start);
avail_regions[i].mr_start = 1048576;
}
}
*avail = avail_regions;
/* On the bare metal platform phys == avail memory */
*physsz = *availsz;
*phys = *avail;
}
void
bare_mem_regions(platform_t plat, struct mem_region **phys, int *physsz,
struct mem_region **avail, int *availsz)
{
uint32_t memsize;
int i, rv;
rv = fdt_get_mem_regions(avail_regions, availsz, &memsize);
if (rv != 0)
panic("%s: could not retrieve mem regions from the 'memory' "
"node, error: %d", __func__, rv);
for (i = 0; i < *availsz; i++) {
if (avail_regions[i].mr_start < 1048576) {
avail_regions[i].mr_size =
avail_regions[i].mr_size -
(1048576 - avail_regions[i].mr_start);
avail_regions[i].mr_start = 1048576;
}
}
*avail = avail_regions;
/* On the bare metal platform phys == avail memory */
*physsz = *availsz;
*phys = *avail;
}
static void
mips_init(void)
{
int i;
#ifdef FDT
struct mem_region mr[FDT_MEM_REGIONS];
uint64_t val;
int mr_cnt;
int j;
#endif
for (i = 0; i < 10; i++) {
phys_avail[i] = 0;
}
/* phys_avail regions are in bytes */
phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
phys_avail[1] = ctob(realmem);
dump_avail[0] = phys_avail[0];
dump_avail[1] = phys_avail[1];
physmem = realmem;
#ifdef FDT
if (fdt_get_mem_regions(mr, &mr_cnt, &val) == 0) {
physmem = btoc(val);
KASSERT((phys_avail[0] >= mr[0].mr_start) && \
(phys_avail[0] < (mr[0].mr_start + mr[0].mr_size)),
("First region is not within FDT memory range"));
/* Limit size of the first region */
phys_avail[1] = (mr[0].mr_start + MIN(mr[0].mr_size, ctob(realmem)));
dump_avail[1] = phys_avail[1];
/* Add the rest of regions */
for (i = 1, j = 2; i < mr_cnt; i++, j+=2) {
phys_avail[j] = mr[i].mr_start;
phys_avail[j+1] = (mr[i].mr_start + mr[i].mr_size);
dump_avail[j] = phys_avail[j];
dump_avail[j+1] = phys_avail[j+1];
}
}
#endif
init_param1();
init_param2(physmem);
mips_cpu_init();
pmap_bootstrap();
mips_proc0_init();
mutex_init();
kdb_init();
#ifdef KDB
if (boothowto & RB_KDB)
kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
#endif
}
static void
mips_init(void)
{
struct mem_region mr[FDT_MEM_REGIONS];
uint64_t val;
int i, j, mr_cnt;
char *memsize;
printf("entry: mips_init()\n");
bootverbose = 1;
for (i = 0; i < 10; i++)
phys_avail[i] = 0;
dump_avail[0] = phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
/*
* The most low memory MT7621 can have. Currently MT7621 is the chip
* that supports the most memory, so that seems reasonable.
*/
realmem = btoc(448 * 1024 * 1024);
if (fdt_get_mem_regions(mr, &mr_cnt, &val) == 0) {
physmem = btoc(val);
printf("RAM size: %ldMB (from FDT)\n",
ctob(physmem) / (1024 * 1024));
KASSERT((phys_avail[0] >= mr[0].mr_start) && \
(phys_avail[0] < (mr[0].mr_start + mr[0].mr_size)),
("First region is not within FDT memory range"));
/* Limit size of the first region */
phys_avail[1] = (mr[0].mr_start +
MIN(mr[0].mr_size, ctob(realmem)));
dump_avail[1] = phys_avail[1];
/* Add the rest of the regions */
for (i = 1, j = 2; i < mr_cnt; i++, j+=2) {
phys_avail[j] = mr[i].mr_start;
phys_avail[j+1] = (mr[i].mr_start + mr[i].mr_size);
dump_avail[j] = phys_avail[j];
dump_avail[j+1] = phys_avail[j+1];
}
} else {
if ((memsize = kern_getenv("memsize")) != NULL) {
physmem = btoc(strtol(memsize, NULL, 0) << 20);
printf("RAM size: %ldMB (from memsize)\n",
ctob(physmem) / (1024 * 1024));
} else { /* All else failed, assume 32MB */
physmem = btoc(32 * 1024 * 1024);
printf("RAM size: %ldMB (assumed)\n",
ctob(physmem) / (1024 * 1024));
}
if (ctob(physmem) < (448 * 1024 * 1024)) {
/*
* Anything up to 448MB is assumed to be directly
* mappable as low memory...
*/
dump_avail[1] = phys_avail[1] = ctob(physmem);
} else if (mtk_soc_get_socid() == MTK_SOC_MT7621) {
/*
* On MT7621 the low memory is limited to 448MB, the
* rest is high memory, mapped at 0x20000000
*/
phys_avail[1] = 448 * 1024 * 1024;
phys_avail[2] = 0x20000000;
phys_avail[3] = phys_avail[2] + ctob(physmem) -
phys_avail[1];
dump_avail[1] = phys_avail[1] - phys_avail[0];
dump_avail[2] = phys_avail[2];
dump_avail[3] = phys_avail[3] - phys_avail[2];
} else {
/*
* We have > 448MB RAM and we're not MT7621? Currently
* there is no such chip, so we'll just limit the RAM to
* 32MB and let the user know...
*/
printf("Unknown chip, assuming 32MB RAM\n");
physmem = btoc(32 * 1024 * 1024);
dump_avail[1] = phys_avail[1] = ctob(physmem);
}
}
if (physmem < realmem)
realmem = physmem;
init_param1();
init_param2(physmem);
mips_cpu_init();
pmap_bootstrap();
mips_proc0_init();
mutex_init();
kdb_init();
#ifdef KDB
if (boothowto & RB_KDB)
kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
#endif
}
