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authorDavid Gibson <david@gibson.dropbear.id.au>2011-04-01 15:15:23 +1100
committerAlexander Graf <agraf@suse.de>2011-04-01 18:34:56 +0200
commit39ac8455106af1ed669b8e10223420cf1ac5b190 (patch)
tree48c935a56286ff50f76982c9d7aab1a0eb835e03 /hw/spapr.c
parentf43e35255cffb6ac6230dd09d308f7909f823f96 (diff)
Implement hcall based RTAS for pSeries machines
On pSeries machines, operating systems can instantiate "RTAS" (Run-Time Abstraction Services), a runtime component of the firmware which implements a number of low-level, infrequently used operations. On logical partitions under a hypervisor, many of the RTAS functions require hypervisor privilege. For simplicity, therefore, hypervisor systems typically implement the in-partition RTAS as just a tiny wrapper around a hypercall which actually implements the various RTAS functions. This patch implements such a hypercall based RTAS for our emulated pSeries machine. A tiny in-partition "firmware" calls a new hypercall, which looks up available RTAS services in a table. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'hw/spapr.c')
-rw-r--r--hw/spapr.c26
1 files changed, 23 insertions, 3 deletions
diff --git a/hw/spapr.c b/hw/spapr.c
index 57140d231d..c07af19543 100644
--- a/hw/spapr.c
+++ b/hw/spapr.c
@@ -40,6 +40,7 @@
#define KERNEL_LOAD_ADDR 0x00000000
#define INITRD_LOAD_ADDR 0x02800000
#define FDT_MAX_SIZE 0x10000
+#define RTAS_MAX_SIZE 0x10000
#define TIMEBASE_FREQ 512000000ULL
@@ -53,6 +54,8 @@ static void *spapr_create_fdt(int *fdt_size, ram_addr_t ramsize,
target_phys_addr_t initrd_base,
target_phys_addr_t initrd_size,
const char *kernel_cmdline,
+ target_phys_addr_t rtas_addr,
+ target_phys_addr_t rtas_size,
long hash_shift)
{
void *fdt;
@@ -195,6 +198,12 @@ static void *spapr_create_fdt(int *fdt_size, ram_addr_t ramsize,
exit(1);
}
+ /* RTAS */
+ ret = spapr_rtas_device_tree_setup(fdt, rtas_addr, rtas_size);
+ if (ret < 0) {
+ fprintf(stderr, "Couldn't set up RTAS device tree properties\n");
+ }
+
_FDT((fdt_pack(fdt)));
*fdt_size = fdt_totalsize(fdt);
@@ -224,11 +233,12 @@ static void ppc_spapr_init(ram_addr_t ram_size,
void *fdt, *htab;
int i;
ram_addr_t ram_offset;
- target_phys_addr_t fdt_addr;
+ target_phys_addr_t fdt_addr, rtas_addr;
uint32_t kernel_base, initrd_base;
- long kernel_size, initrd_size, htab_size;
+ long kernel_size, initrd_size, htab_size, rtas_size;
long pteg_shift = 17;
int fdt_size;
+ char *filename;
spapr = qemu_malloc(sizeof(*spapr));
cpu_ppc_hypercall = emulate_spapr_hypercall;
@@ -237,6 +247,8 @@ static void ppc_spapr_init(ram_addr_t ram_size,
* 2GB, so that it can be processed with 32-bit code if
* necessary */
fdt_addr = MIN(ram_size, 0x80000000) - FDT_MAX_SIZE;
+ /* RTAS goes just below that */
+ rtas_addr = fdt_addr - RTAS_MAX_SIZE;
/* init CPUs */
if (cpu_model == NULL) {
@@ -276,6 +288,14 @@ static void ppc_spapr_init(ram_addr_t ram_size,
envs[i]->htab_mask = htab_size - 1;
}
+ filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "spapr-rtas.bin");
+ rtas_size = load_image_targphys(filename, rtas_addr, ram_size - rtas_addr);
+ if (rtas_size < 0) {
+ hw_error("qemu: could not load LPAR rtas '%s'\n", filename);
+ exit(1);
+ }
+ qemu_free(filename);
+
spapr->vio_bus = spapr_vio_bus_init();
for (i = 0; i < MAX_SERIAL_PORTS; i++) {
@@ -323,7 +343,7 @@ static void ppc_spapr_init(ram_addr_t ram_size,
/* Prepare the device tree */
fdt = spapr_create_fdt(&fdt_size, ram_size, cpu_model, envs, spapr,
initrd_base, initrd_size, kernel_cmdline,
- pteg_shift + 7);
+ rtas_addr, rtas_size, pteg_shift + 7);
assert(fdt != NULL);
cpu_physical_memory_write(fdt_addr, fdt, fdt_size);