400 lines
13 KiB
C
400 lines
13 KiB
C
/*
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* QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
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*
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* Copyright (c) 2004-2007 Fabrice Bellard
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* Copyright (c) 2007 Jocelyn Mayer
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* Copyright (c) 2010 David Gibson, IBM Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*/
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#include "sysemu.h"
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#include "hw.h"
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#include "elf.h"
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#include "hw/boards.h"
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#include "hw/ppc.h"
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#include "hw/loader.h"
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#include "hw/spapr.h"
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#include "hw/spapr_vio.h"
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#include "hw/xics.h"
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#include <libfdt.h>
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#define KERNEL_LOAD_ADDR 0x00000000
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#define INITRD_LOAD_ADDR 0x02800000
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#define FDT_MAX_SIZE 0x10000
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#define RTAS_MAX_SIZE 0x10000
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#define TIMEBASE_FREQ 512000000ULL
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#define MAX_CPUS 32
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#define XICS_IRQS 1024
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sPAPREnvironment *spapr;
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static void *spapr_create_fdt(int *fdt_size, ram_addr_t ramsize,
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const char *cpu_model, CPUState *envs[],
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sPAPREnvironment *spapr,
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target_phys_addr_t initrd_base,
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target_phys_addr_t initrd_size,
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const char *kernel_cmdline,
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target_phys_addr_t rtas_addr,
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target_phys_addr_t rtas_size,
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long hash_shift)
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{
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void *fdt;
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uint64_t mem_reg_property[] = { 0, cpu_to_be64(ramsize) };
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uint32_t start_prop = cpu_to_be32(initrd_base);
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uint32_t end_prop = cpu_to_be32(initrd_base + initrd_size);
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uint32_t pft_size_prop[] = {0, cpu_to_be32(hash_shift)};
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char hypertas_prop[] = "hcall-pft\0hcall-term\0hcall-dabr\0hcall-interrupt";
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uint32_t interrupt_server_ranges_prop[] = {0, cpu_to_be32(smp_cpus)};
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int i;
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char *modelname;
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int ret;
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#define _FDT(exp) \
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do { \
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int ret = (exp); \
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if (ret < 0) { \
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fprintf(stderr, "qemu: error creating device tree: %s: %s\n", \
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#exp, fdt_strerror(ret)); \
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exit(1); \
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} \
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} while (0)
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fdt = qemu_mallocz(FDT_MAX_SIZE);
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_FDT((fdt_create(fdt, FDT_MAX_SIZE)));
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_FDT((fdt_finish_reservemap(fdt)));
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/* Root node */
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_FDT((fdt_begin_node(fdt, "")));
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_FDT((fdt_property_string(fdt, "device_type", "chrp")));
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_FDT((fdt_property_string(fdt, "model", "qemu,emulated-pSeries-LPAR")));
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_FDT((fdt_property_cell(fdt, "#address-cells", 0x2)));
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_FDT((fdt_property_cell(fdt, "#size-cells", 0x2)));
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/* /chosen */
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_FDT((fdt_begin_node(fdt, "chosen")));
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_FDT((fdt_property_string(fdt, "bootargs", kernel_cmdline)));
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_FDT((fdt_property(fdt, "linux,initrd-start",
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&start_prop, sizeof(start_prop))));
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_FDT((fdt_property(fdt, "linux,initrd-end",
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&end_prop, sizeof(end_prop))));
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_FDT((fdt_end_node(fdt)));
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/* memory node */
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_FDT((fdt_begin_node(fdt, "memory@0")));
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_FDT((fdt_property_string(fdt, "device_type", "memory")));
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_FDT((fdt_property(fdt, "reg",
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mem_reg_property, sizeof(mem_reg_property))));
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_FDT((fdt_end_node(fdt)));
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/* cpus */
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_FDT((fdt_begin_node(fdt, "cpus")));
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_FDT((fdt_property_cell(fdt, "#address-cells", 0x1)));
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_FDT((fdt_property_cell(fdt, "#size-cells", 0x0)));
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modelname = qemu_strdup(cpu_model);
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for (i = 0; i < strlen(modelname); i++) {
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modelname[i] = toupper(modelname[i]);
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}
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for (i = 0; i < smp_cpus; i++) {
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CPUState *env = envs[i];
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uint32_t gserver_prop[] = {cpu_to_be32(i), 0}; /* HACK! */
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char *nodename;
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uint32_t segs[] = {cpu_to_be32(28), cpu_to_be32(40),
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0xffffffff, 0xffffffff};
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if (asprintf(&nodename, "%s@%x", modelname, i) < 0) {
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fprintf(stderr, "Allocation failure\n");
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exit(1);
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}
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_FDT((fdt_begin_node(fdt, nodename)));
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free(nodename);
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_FDT((fdt_property_cell(fdt, "reg", i)));
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_FDT((fdt_property_string(fdt, "device_type", "cpu")));
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_FDT((fdt_property_cell(fdt, "cpu-version", env->spr[SPR_PVR])));
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_FDT((fdt_property_cell(fdt, "dcache-block-size",
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env->dcache_line_size)));
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_FDT((fdt_property_cell(fdt, "icache-block-size",
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env->icache_line_size)));
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_FDT((fdt_property_cell(fdt, "timebase-frequency", TIMEBASE_FREQ)));
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/* Hardcode CPU frequency for now. It's kind of arbitrary on
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* full emu, for kvm we should copy it from the host */
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_FDT((fdt_property_cell(fdt, "clock-frequency", 1000000000)));
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_FDT((fdt_property_cell(fdt, "ibm,slb-size", env->slb_nr)));
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_FDT((fdt_property(fdt, "ibm,pft-size",
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pft_size_prop, sizeof(pft_size_prop))));
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_FDT((fdt_property_string(fdt, "status", "okay")));
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_FDT((fdt_property(fdt, "64-bit", NULL, 0)));
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_FDT((fdt_property_cell(fdt, "ibm,ppc-interrupt-server#s", i)));
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_FDT((fdt_property(fdt, "ibm,ppc-interrupt-gserver#s",
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gserver_prop, sizeof(gserver_prop))));
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if (envs[i]->mmu_model & POWERPC_MMU_1TSEG) {
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_FDT((fdt_property(fdt, "ibm,processor-segment-sizes",
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segs, sizeof(segs))));
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}
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_FDT((fdt_end_node(fdt)));
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}
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qemu_free(modelname);
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_FDT((fdt_end_node(fdt)));
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/* RTAS */
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_FDT((fdt_begin_node(fdt, "rtas")));
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_FDT((fdt_property(fdt, "ibm,hypertas-functions", hypertas_prop,
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sizeof(hypertas_prop))));
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_FDT((fdt_end_node(fdt)));
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/* interrupt controller */
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_FDT((fdt_begin_node(fdt, "interrupt-controller@0")));
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_FDT((fdt_property_string(fdt, "device_type",
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"PowerPC-External-Interrupt-Presentation")));
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_FDT((fdt_property_string(fdt, "compatible", "IBM,ppc-xicp")));
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_FDT((fdt_property_cell(fdt, "reg", 0)));
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_FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
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_FDT((fdt_property(fdt, "ibm,interrupt-server-ranges",
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interrupt_server_ranges_prop,
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sizeof(interrupt_server_ranges_prop))));
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_FDT((fdt_end_node(fdt)));
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/* vdevice */
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_FDT((fdt_begin_node(fdt, "vdevice")));
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_FDT((fdt_property_string(fdt, "device_type", "vdevice")));
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_FDT((fdt_property_string(fdt, "compatible", "IBM,vdevice")));
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_FDT((fdt_property_cell(fdt, "#address-cells", 0x1)));
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_FDT((fdt_property_cell(fdt, "#size-cells", 0x0)));
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_FDT((fdt_property_cell(fdt, "#interrupt-cells", 0x2)));
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_FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
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_FDT((fdt_end_node(fdt)));
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_FDT((fdt_end_node(fdt))); /* close root node */
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_FDT((fdt_finish(fdt)));
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/* re-expand to allow for further tweaks */
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_FDT((fdt_open_into(fdt, fdt, FDT_MAX_SIZE)));
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ret = spapr_populate_vdevice(spapr->vio_bus, fdt);
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if (ret < 0) {
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fprintf(stderr, "couldn't setup vio devices in fdt\n");
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exit(1);
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}
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/* RTAS */
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ret = spapr_rtas_device_tree_setup(fdt, rtas_addr, rtas_size);
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if (ret < 0) {
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fprintf(stderr, "Couldn't set up RTAS device tree properties\n");
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}
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_FDT((fdt_pack(fdt)));
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*fdt_size = fdt_totalsize(fdt);
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return fdt;
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}
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static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
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{
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return (addr & 0x0fffffff) + KERNEL_LOAD_ADDR;
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}
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static void emulate_spapr_hypercall(CPUState *env)
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{
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env->gpr[3] = spapr_hypercall(env, env->gpr[3], &env->gpr[4]);
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}
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/* pSeries LPAR / sPAPR hardware init */
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static void ppc_spapr_init(ram_addr_t ram_size,
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const char *boot_device,
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const char *kernel_filename,
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const char *kernel_cmdline,
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const char *initrd_filename,
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const char *cpu_model)
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{
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CPUState *envs[MAX_CPUS];
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void *fdt, *htab;
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int i;
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ram_addr_t ram_offset;
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target_phys_addr_t fdt_addr, rtas_addr;
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uint32_t kernel_base, initrd_base;
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long kernel_size, initrd_size, htab_size, rtas_size;
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long pteg_shift = 17;
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int fdt_size;
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char *filename;
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spapr = qemu_malloc(sizeof(*spapr));
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cpu_ppc_hypercall = emulate_spapr_hypercall;
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/* We place the device tree just below either the top of RAM, or
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* 2GB, so that it can be processed with 32-bit code if
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* necessary */
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fdt_addr = MIN(ram_size, 0x80000000) - FDT_MAX_SIZE;
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/* RTAS goes just below that */
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rtas_addr = fdt_addr - RTAS_MAX_SIZE;
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/* init CPUs */
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if (cpu_model == NULL) {
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cpu_model = "POWER7";
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}
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for (i = 0; i < smp_cpus; i++) {
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CPUState *env = cpu_init(cpu_model);
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if (!env) {
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fprintf(stderr, "Unable to find PowerPC CPU definition\n");
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exit(1);
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}
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/* Set time-base frequency to 512 MHz */
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cpu_ppc_tb_init(env, TIMEBASE_FREQ);
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qemu_register_reset((QEMUResetHandler *)&cpu_reset, env);
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env->hreset_vector = 0x60;
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env->hreset_excp_prefix = 0;
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env->gpr[3] = i;
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envs[i] = env;
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}
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/* allocate RAM */
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ram_offset = qemu_ram_alloc(NULL, "ppc_spapr.ram", ram_size);
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cpu_register_physical_memory(0, ram_size, ram_offset);
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/* allocate hash page table. For now we always make this 16mb,
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* later we should probably make it scale to the size of guest
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* RAM */
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htab_size = 1ULL << (pteg_shift + 7);
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htab = qemu_mallocz(htab_size);
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for (i = 0; i < smp_cpus; i++) {
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envs[i]->external_htab = htab;
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envs[i]->htab_base = -1;
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envs[i]->htab_mask = htab_size - 1;
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}
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filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "spapr-rtas.bin");
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rtas_size = load_image_targphys(filename, rtas_addr, ram_size - rtas_addr);
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if (rtas_size < 0) {
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hw_error("qemu: could not load LPAR rtas '%s'\n", filename);
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exit(1);
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}
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qemu_free(filename);
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/* Set up Interrupt Controller */
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spapr->icp = xics_system_init(smp_cpus, envs, XICS_IRQS);
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/* Set up VIO bus */
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spapr->vio_bus = spapr_vio_bus_init();
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for (i = 0; i < MAX_SERIAL_PORTS; i++) {
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if (serial_hds[i]) {
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spapr_vty_create(spapr->vio_bus, i, serial_hds[i]);
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}
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}
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if (kernel_filename) {
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uint64_t lowaddr = 0;
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kernel_base = KERNEL_LOAD_ADDR;
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kernel_size = load_elf(kernel_filename, translate_kernel_address, NULL,
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NULL, &lowaddr, NULL, 1, ELF_MACHINE, 0);
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if (kernel_size < 0) {
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kernel_size = load_image_targphys(kernel_filename, kernel_base,
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ram_size - kernel_base);
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}
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if (kernel_size < 0) {
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fprintf(stderr, "qemu: could not load kernel '%s'\n",
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kernel_filename);
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exit(1);
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}
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/* load initrd */
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if (initrd_filename) {
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initrd_base = INITRD_LOAD_ADDR;
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initrd_size = load_image_targphys(initrd_filename, initrd_base,
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ram_size - initrd_base);
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if (initrd_size < 0) {
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fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
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initrd_filename);
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exit(1);
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}
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} else {
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initrd_base = 0;
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initrd_size = 0;
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}
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} else {
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fprintf(stderr, "pSeries machine needs -kernel for now");
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exit(1);
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}
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/* Prepare the device tree */
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fdt = spapr_create_fdt(&fdt_size, ram_size, cpu_model, envs, spapr,
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initrd_base, initrd_size, kernel_cmdline,
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rtas_addr, rtas_size, pteg_shift + 7);
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assert(fdt != NULL);
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cpu_physical_memory_write(fdt_addr, fdt, fdt_size);
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qemu_free(fdt);
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envs[0]->gpr[3] = fdt_addr;
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envs[0]->gpr[5] = 0;
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envs[0]->hreset_vector = kernel_base;
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}
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static QEMUMachine spapr_machine = {
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.name = "pseries",
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.desc = "pSeries Logical Partition (PAPR compliant)",
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.init = ppc_spapr_init,
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.max_cpus = MAX_CPUS,
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.no_vga = 1,
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.no_parallel = 1,
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};
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static void spapr_machine_init(void)
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{
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qemu_register_machine(&spapr_machine);
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}
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machine_init(spapr_machine_init);
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