diff options
| author |   kettenis <kettenis@openbsd.org> | 2020-06-07 11:54:45 +0000 |
|---|---|---|
| committer | kettenis <kettenis@openbsd.org> | 2020-06-07 11:54:45 +0000 |
| commit | edd95fcdb758482472f8a90f023d22060d240365 (patch) | |
| tree | 563faa427ac5a96683a290da45c3b48d42234ccc /sys | |
| parent | More debug printing such that we can see what is still missing. (diff) | |
| download | wireguard-openbsd-edd95fcdb758482472f8a90f023d22060d240365.tar.xz wireguard-openbsd-edd95fcdb758482472f8a90f023d22060d240365.zip | |
Remap FDT such that we can access it with translations enabled.
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/arch/powerpc64/powerpc64/machdep.c | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/sys/arch/powerpc64/powerpc64/machdep.c b/sys/arch/powerpc64/powerpc64/machdep.c index 109560abf08..739c12d4ee2 100644 --- a/sys/arch/powerpc64/powerpc64/machdep.c +++ b/sys/arch/powerpc64/powerpc64/machdep.c @@ -1,4 +1,4 @@ -/* $OpenBSD: machdep.c,v 1.14 2020/06/07 10:16:53 kettenis Exp $ */ +/* $OpenBSD: machdep.c,v 1.15 2020/06/07 11:54:45 kettenis Exp $ */ /* * Copyright (c) 2020 Mark Kettenis <kettenis@openbsd.org> @@ -76,6 +76,9 @@ struct fdt_reg initrd_reg; void memreg_add(const struct fdt_reg *); void memreg_remove(const struct fdt_reg *); +paddr_t fdt_pa; +size_t fdt_size; + void init_powernv(void *fdt, void *tocbase) { @@ -95,8 +98,9 @@ init_powernv(void *fdt, void *tocbase) memset(__bss_start, 0, _end - __bss_start); if (!fdt_init(fdt) || fdt_get_size(fdt) == 0) - panic("%s: no FDT\r\n", __func__); + panic("no FDT"); + /* Get OPAL base and entry addresses from FDT. */ node = fdt_find_node("/ibm,opal"); if (node) { fdt_node_property(node, "opal-base-address", &prop); @@ -106,9 +110,12 @@ init_powernv(void *fdt, void *tocbase) fdt_node_property(node, "compatible", &prop); } + /* At this point we can call OPAL runtime services and use printf(9). */ printf("Hello, World!\n"); - printf("MSR 0x%016llx\n", mfmsr()); + /* Stash these such that we can remap the FDT later. */ + fdt_pa = (paddr_t)fdt; + fdt_size = fdt_get_size(fdt); /* * Initialize all traps with the stub that calls the generic @@ -416,9 +423,27 @@ delay(u_int us) void cpu_startup(void) { + paddr_t pa, epa; + vaddr_t va; + void *fdt; + printf("%s", version); bufinit(); + + /* Remap the FDT. */ + pa = trunc_page(fdt_pa); + epa = round_page(fdt_pa + fdt_size); + va = (vaddr_t)km_alloc(epa - pa, &kv_any, &kp_none, &kd_waitok); + fdt = (void *)(va + (fdt_pa & PAGE_MASK)); + while (pa < epa) { + pmap_kenter_pa(va, pa, PROT_READ | PROT_WRITE); + va += PAGE_SIZE; + pa += PAGE_SIZE; + } + + if (!fdt_init(fdt) || fdt_get_size(fdt) == 0) + panic("can't remap FDT"); } void |