diff options
Diffstat (limited to 'hw/spapr.c')
| -rw-r--r-- | hw/spapr.c | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/hw/spapr.c b/hw/spapr.c new file mode 100644 index 0000000000..410213afc8 --- /dev/null +++ b/hw/spapr.c @@ -0,0 +1,313 @@ +/* + * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator + * + * Copyright (c) 2004-2007 Fabrice Bellard + * Copyright (c) 2007 Jocelyn Mayer + * Copyright (c) 2010 David Gibson, IBM Corporation. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + */ +#include "sysemu.h" +#include "qemu-char.h" +#include "hw.h" +#include "elf.h" + +#include "hw/boards.h" +#include "hw/ppc.h" +#include "hw/loader.h" + +#include "hw/spapr.h" + +#include <libfdt.h> + +#define KERNEL_LOAD_ADDR 0x00000000 +#define INITRD_LOAD_ADDR 0x02800000 +#define FDT_MAX_SIZE 0x10000 + +#define TIMEBASE_FREQ 512000000ULL + +#define MAX_CPUS 32 + +sPAPREnvironment *spapr; + +static void *spapr_create_fdt(int *fdt_size, ram_addr_t ramsize, + const char *cpu_model, CPUState *envs[], + sPAPREnvironment *spapr, + target_phys_addr_t initrd_base, + target_phys_addr_t initrd_size, + const char *kernel_cmdline) +{ + void *fdt; + uint64_t mem_reg_property[] = { 0, cpu_to_be64(ramsize) }; + uint32_t start_prop = cpu_to_be32(initrd_base); + uint32_t end_prop = cpu_to_be32(initrd_base + initrd_size); + int i; + char *modelname; + +#define _FDT(exp) \ + do { \ + int ret = (exp); \ + if (ret < 0) { \ + fprintf(stderr, "qemu: error creating device tree: %s: %s\n", \ + #exp, fdt_strerror(ret)); \ + exit(1); \ + } \ + } while (0) + + fdt = qemu_mallocz(FDT_MAX_SIZE); + _FDT((fdt_create(fdt, FDT_MAX_SIZE))); + + _FDT((fdt_finish_reservemap(fdt))); + + /* Root node */ + _FDT((fdt_begin_node(fdt, ""))); + _FDT((fdt_property_string(fdt, "device_type", "chrp"))); + _FDT((fdt_property_string(fdt, "model", "qemu,emulated-pSeries-LPAR"))); + + _FDT((fdt_property_cell(fdt, "#address-cells", 0x2))); + _FDT((fdt_property_cell(fdt, "#size-cells", 0x2))); + + /* /chosen */ + _FDT((fdt_begin_node(fdt, "chosen"))); + + _FDT((fdt_property_string(fdt, "bootargs", kernel_cmdline))); + _FDT((fdt_property(fdt, "linux,initrd-start", + &start_prop, sizeof(start_prop)))); + _FDT((fdt_property(fdt, "linux,initrd-end", + &end_prop, sizeof(end_prop)))); + + _FDT((fdt_end_node(fdt))); + + /* memory node */ + _FDT((fdt_begin_node(fdt, "memory@0"))); + + _FDT((fdt_property_string(fdt, "device_type", "memory"))); + _FDT((fdt_property(fdt, "reg", + mem_reg_property, sizeof(mem_reg_property)))); + + _FDT((fdt_end_node(fdt))); + + /* cpus */ + _FDT((fdt_begin_node(fdt, "cpus"))); + + _FDT((fdt_property_cell(fdt, "#address-cells", 0x1))); + _FDT((fdt_property_cell(fdt, "#size-cells", 0x0))); + + modelname = qemu_strdup(cpu_model); + + for (i = 0; i < strlen(modelname); i++) { + modelname[i] = toupper(modelname[i]); + } + + for (i = 0; i < smp_cpus; i++) { + CPUState *env = envs[i]; + char *nodename; + uint32_t segs[] = {cpu_to_be32(28), cpu_to_be32(40), + 0xffffffff, 0xffffffff}; + + if (asprintf(&nodename, "%s@%x", modelname, i) < 0) { + fprintf(stderr, "Allocation failure\n"); + exit(1); + } + + _FDT((fdt_begin_node(fdt, nodename))); + + free(nodename); + + _FDT((fdt_property_cell(fdt, "reg", i))); + _FDT((fdt_property_string(fdt, "device_type", "cpu"))); + + _FDT((fdt_property_cell(fdt, "cpu-version", env->spr[SPR_PVR]))); + _FDT((fdt_property_cell(fdt, "dcache-block-size", + env->dcache_line_size))); + _FDT((fdt_property_cell(fdt, "icache-block-size", + env->icache_line_size))); + _FDT((fdt_property_cell(fdt, "timebase-frequency", TIMEBASE_FREQ))); + /* Hardcode CPU frequency for now. It's kind of arbitrary on + * full emu, for kvm we should copy it from the host */ + _FDT((fdt_property_cell(fdt, "clock-frequency", 1000000000))); + _FDT((fdt_property_cell(fdt, "ibm,slb-size", env->slb_nr))); + _FDT((fdt_property_string(fdt, "status", "okay"))); + _FDT((fdt_property(fdt, "64-bit", NULL, 0))); + + if (envs[i]->mmu_model & POWERPC_MMU_1TSEG) { + _FDT((fdt_property(fdt, "ibm,processor-segment-sizes", + segs, sizeof(segs)))); + } + + _FDT((fdt_end_node(fdt))); + } + + qemu_free(modelname); + + _FDT((fdt_end_node(fdt))); + + _FDT((fdt_end_node(fdt))); /* close root node */ + _FDT((fdt_finish(fdt))); + + *fdt_size = fdt_totalsize(fdt); + + return fdt; +} + +static uint64_t translate_kernel_address(void *opaque, uint64_t addr) +{ + return (addr & 0x0fffffff) + KERNEL_LOAD_ADDR; +} + +static void emulate_spapr_hypercall(CPUState *env) +{ + env->gpr[3] = spapr_hypercall(env, env->gpr[3], &env->gpr[4]); +} + +/* FIXME: hack until we implement the proper VIO console */ +static target_ulong h_put_term_char(CPUState *env, sPAPREnvironment *spapr, + target_ulong opcode, target_ulong *args) +{ + uint8_t buf[16]; + + stq_p(buf, args[2]); + stq_p(buf + 8, args[3]); + + qemu_chr_write(serial_hds[0], buf, args[1]); + + return 0; +} + + +/* pSeries LPAR / sPAPR hardware init */ +static void ppc_spapr_init(ram_addr_t ram_size, + const char *boot_device, + const char *kernel_filename, + const char *kernel_cmdline, + const char *initrd_filename, + const char *cpu_model) +{ + CPUState *envs[MAX_CPUS]; + void *fdt; + int i; + ram_addr_t ram_offset; + target_phys_addr_t fdt_addr; + uint32_t kernel_base, initrd_base; + long kernel_size, initrd_size; + int fdt_size; + + spapr = qemu_malloc(sizeof(*spapr)); + cpu_ppc_hypercall = emulate_spapr_hypercall; + + /* We place the device tree just below either the top of RAM, or + * 2GB, so that it can be processed with 32-bit code if + * necessary */ + fdt_addr = MIN(ram_size, 0x80000000) - FDT_MAX_SIZE; + + /* init CPUs */ + if (cpu_model == NULL) { + cpu_model = "POWER7"; + } + for (i = 0; i < smp_cpus; i++) { + CPUState *env = cpu_init(cpu_model); + + if (!env) { + fprintf(stderr, "Unable to find PowerPC CPU definition\n"); + exit(1); + } + /* Set time-base frequency to 512 MHz */ + cpu_ppc_tb_init(env, TIMEBASE_FREQ); + qemu_register_reset((QEMUResetHandler *)&cpu_reset, env); + + env->hreset_vector = 0x60; + env->hreset_excp_prefix = 0; + env->gpr[3] = i; + + envs[i] = env; + } + + /* allocate RAM */ + ram_offset = qemu_ram_alloc(NULL, "ppc_spapr.ram", ram_size); + cpu_register_physical_memory(0, ram_size, ram_offset); + + spapr_register_hypercall(H_PUT_TERM_CHAR, h_put_term_char); + + if (kernel_filename) { + uint64_t lowaddr = 0; + + kernel_base = KERNEL_LOAD_ADDR; + + kernel_size = load_elf(kernel_filename, translate_kernel_address, NULL, + NULL, &lowaddr, NULL, 1, ELF_MACHINE, 0); + if (kernel_size < 0) { + kernel_size = load_image_targphys(kernel_filename, kernel_base, + ram_size - kernel_base); + } + if (kernel_size < 0) { + fprintf(stderr, "qemu: could not load kernel '%s'\n", + kernel_filename); + exit(1); + } + + /* load initrd */ + if (initrd_filename) { + initrd_base = INITRD_LOAD_ADDR; + initrd_size = load_image_targphys(initrd_filename, initrd_base, + ram_size - initrd_base); + if (initrd_size < 0) { + fprintf(stderr, "qemu: could not load initial ram disk '%s'\n", + initrd_filename); + exit(1); + } + } else { + initrd_base = 0; + initrd_size = 0; + } + + } else { + fprintf(stderr, "pSeries machine needs -kernel for now"); + exit(1); + } + + /* Prepare the device tree */ + fdt = spapr_create_fdt(&fdt_size, ram_size, cpu_model, envs, spapr, + initrd_base, initrd_size, kernel_cmdline); + assert(fdt != NULL); + + cpu_physical_memory_write(fdt_addr, fdt, fdt_size); + + qemu_free(fdt); + + envs[0]->gpr[3] = fdt_addr; + envs[0]->gpr[5] = 0; + envs[0]->hreset_vector = kernel_base; +} + +static QEMUMachine spapr_machine = { + .name = "pseries", + .desc = "pSeries Logical Partition (PAPR compliant)", + .init = ppc_spapr_init, + .max_cpus = MAX_CPUS, + .no_vga = 1, + .no_parallel = 1, +}; + +static void spapr_machine_init(void) +{ + qemu_register_machine(&spapr_machine); +} + +machine_init(spapr_machine_init); |