From 8d8897accb1c9b28267b3c7eb402b6bc5d967f7e Mon Sep 17 00:00:00 2001 From: Anup Patel Date: Thu, 13 Jan 2022 20:20:39 +0530 Subject: hw/riscv: spike: Allow using binary firmware as bios Currently, we have to use OpenSBI firmware ELF as bios for the spike machine because the HTIF console requires ELF for parsing "fromhost" and "tohost" symbols. The latest OpenSBI can now optionally pick-up HTIF register address from HTIF DT node so using this feature spike machine can now use OpenSBI firmware BIN as bios. Signed-off-by: Anup Patel Reviewed-by: Alistair Francis Reviewed-by: Bin Meng Signed-off-by: Alistair Francis --- hw/char/riscv_htif.c | 33 ++++++++++++++++++++++----------- hw/riscv/spike.c | 41 +++++++++++++++++++++++++---------------- include/hw/char/riscv_htif.h | 5 ++++- include/hw/riscv/spike.h | 1 + 4 files changed, 52 insertions(+), 28 deletions(-) diff --git a/hw/char/riscv_htif.c b/hw/char/riscv_htif.c index ddae738..729edbf 100644 --- a/hw/char/riscv_htif.c +++ b/hw/char/riscv_htif.c @@ -228,13 +228,25 @@ static const MemoryRegionOps htif_mm_ops = { .write = htif_mm_write, }; +bool htif_uses_elf_symbols(void) +{ + return (address_symbol_set == 3) ? true : false; +} + HTIFState *htif_mm_init(MemoryRegion *address_space, MemoryRegion *main_mem, - CPURISCVState *env, Chardev *chr) + CPURISCVState *env, Chardev *chr, uint64_t nonelf_base) { - uint64_t base = MIN(tohost_addr, fromhost_addr); - uint64_t size = MAX(tohost_addr + 8, fromhost_addr + 8) - base; - uint64_t tohost_offset = tohost_addr - base; - uint64_t fromhost_offset = fromhost_addr - base; + uint64_t base, size, tohost_offset, fromhost_offset; + + if (!htif_uses_elf_symbols()) { + fromhost_addr = nonelf_base; + tohost_addr = nonelf_base + 8; + } + + base = MIN(tohost_addr, fromhost_addr); + size = MAX(tohost_addr + 8, fromhost_addr + 8) - base; + tohost_offset = tohost_addr - base; + fromhost_offset = fromhost_addr - base; HTIFState *s = g_malloc0(sizeof(HTIFState)); s->address_space = address_space; @@ -249,12 +261,11 @@ HTIFState *htif_mm_init(MemoryRegion *address_space, MemoryRegion *main_mem, qemu_chr_fe_init(&s->chr, chr, &error_abort); qemu_chr_fe_set_handlers(&s->chr, htif_can_recv, htif_recv, htif_event, htif_be_change, s, NULL, true); - if (address_symbol_set == 3) { - memory_region_init_io(&s->mmio, NULL, &htif_mm_ops, s, - TYPE_HTIF_UART, size); - memory_region_add_subregion_overlap(address_space, base, - &s->mmio, 1); - } + + memory_region_init_io(&s->mmio, NULL, &htif_mm_ops, s, + TYPE_HTIF_UART, size); + memory_region_add_subregion_overlap(address_space, base, + &s->mmio, 1); return s; } diff --git a/hw/riscv/spike.c b/hw/riscv/spike.c index 288d69c..597df4c 100644 --- a/hw/riscv/spike.c +++ b/hw/riscv/spike.c @@ -42,6 +42,7 @@ static const MemMapEntry spike_memmap[] = { [SPIKE_MROM] = { 0x1000, 0xf000 }, + [SPIKE_HTIF] = { 0x1000000, 0x1000 }, [SPIKE_CLINT] = { 0x2000000, 0x10000 }, [SPIKE_DRAM] = { 0x80000000, 0x0 }, }; @@ -75,6 +76,10 @@ static void create_fdt(SpikeState *s, const MemMapEntry *memmap, qemu_fdt_add_subnode(fdt, "/htif"); qemu_fdt_setprop_string(fdt, "/htif", "compatible", "ucb,htif0"); + if (!htif_uses_elf_symbols()) { + qemu_fdt_setprop_cells(fdt, "/htif", "reg", + 0x0, memmap[SPIKE_HTIF].base, 0x0, memmap[SPIKE_HTIF].size); + } qemu_fdt_add_subnode(fdt, "/soc"); qemu_fdt_setprop(fdt, "/soc", "ranges", NULL, 0); @@ -172,6 +177,7 @@ static void create_fdt(SpikeState *s, const MemMapEntry *memmap, if (cmdline) { qemu_fdt_add_subnode(fdt, "/chosen"); qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline); + qemu_fdt_setprop_string(fdt, "/chosen", "stdout-path", "/htif"); } } @@ -241,10 +247,6 @@ static void spike_board_init(MachineState *machine) memory_region_add_subregion(system_memory, memmap[SPIKE_DRAM].base, machine->ram); - /* create device tree */ - create_fdt(s, memmap, machine->ram_size, machine->kernel_cmdline, - riscv_is_32bit(&s->soc[0])); - /* boot rom */ memory_region_init_rom(mask_rom, NULL, "riscv.spike.mrom", memmap[SPIKE_MROM].size, &error_fatal); @@ -266,6 +268,7 @@ static void spike_board_init(MachineState *machine) htif_symbol_callback); } + /* Load kernel */ if (machine->kernel_filename) { kernel_start_addr = riscv_calc_kernel_start_addr(&s->soc[0], firmware_end_addr); @@ -273,17 +276,6 @@ static void spike_board_init(MachineState *machine) kernel_entry = riscv_load_kernel(machine->kernel_filename, kernel_start_addr, htif_symbol_callback); - - if (machine->initrd_filename) { - hwaddr start; - hwaddr end = riscv_load_initrd(machine->initrd_filename, - machine->ram_size, kernel_entry, - &start); - qemu_fdt_setprop_cell(s->fdt, "/chosen", - "linux,initrd-start", start); - qemu_fdt_setprop_cell(s->fdt, "/chosen", "linux,initrd-end", - end); - } } else { /* * If dynamic firmware is used, it doesn't know where is the next mode @@ -292,6 +284,22 @@ static void spike_board_init(MachineState *machine) kernel_entry = 0; } + /* Create device tree */ + create_fdt(s, memmap, machine->ram_size, machine->kernel_cmdline, + riscv_is_32bit(&s->soc[0])); + + /* Load initrd */ + if (machine->kernel_filename && machine->initrd_filename) { + hwaddr start; + hwaddr end = riscv_load_initrd(machine->initrd_filename, + machine->ram_size, kernel_entry, + &start); + qemu_fdt_setprop_cell(s->fdt, "/chosen", + "linux,initrd-start", start); + qemu_fdt_setprop_cell(s->fdt, "/chosen", "linux,initrd-end", + end); + } + /* Compute the fdt load address in dram */ fdt_load_addr = riscv_load_fdt(memmap[SPIKE_DRAM].base, machine->ram_size, s->fdt); @@ -303,7 +311,8 @@ static void spike_board_init(MachineState *machine) /* initialize HTIF using symbols found in load_kernel */ htif_mm_init(system_memory, mask_rom, - &s->soc[0].harts[0].env, serial_hd(0)); + &s->soc[0].harts[0].env, serial_hd(0), + memmap[SPIKE_HTIF].base); } static void spike_machine_instance_init(Object *obj) diff --git a/include/hw/char/riscv_htif.h b/include/hw/char/riscv_htif.h index fb9452c..f888ac1 100644 --- a/include/hw/char/riscv_htif.h +++ b/include/hw/char/riscv_htif.h @@ -52,8 +52,11 @@ extern const MemoryRegionOps htif_io_ops; void htif_symbol_callback(const char *st_name, int st_info, uint64_t st_value, uint64_t st_size); +/* Check if HTIF uses ELF symbols */ +bool htif_uses_elf_symbols(void); + /* legacy pre qom */ HTIFState *htif_mm_init(MemoryRegion *address_space, MemoryRegion *main_mem, - CPURISCVState *env, Chardev *chr); + CPURISCVState *env, Chardev *chr, uint64_t nonelf_base); #endif diff --git a/include/hw/riscv/spike.h b/include/hw/riscv/spike.h index cdd1a13..73d6923 100644 --- a/include/hw/riscv/spike.h +++ b/include/hw/riscv/spike.h @@ -43,6 +43,7 @@ struct SpikeState { enum { SPIKE_MROM, + SPIKE_HTIF, SPIKE_CLINT, SPIKE_DRAM }; -- cgit v1.1