qemu-e2k/hw/alpha/dp264.c

189 lines
5.8 KiB
C
Raw Normal View History

/*
* QEMU Alpha DP264/CLIPPER hardware system emulator.
*
* Choose CLIPPER IRQ mappings over, say, DP264, MONET, or WEBBRICK
* variants because CLIPPER doesn't have an SMC669 SuperIO controller
* that we need to emulate as well.
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "cpu.h"
#include "hw/hw.h"
#include "elf.h"
#include "hw/loader.h"
#include "hw/boards.h"
#include "alpha_sys.h"
#include "qemu/error-report.h"
#include "sysemu/sysemu.h"
#include "hw/timer/mc146818rtc.h"
#include "hw/ide.h"
#include "hw/timer/i8254.h"
#include "hw/isa/superio.h"
#include "hw/dma/i8257.h"
#include "qemu/cutils.h"
#define MAX_IDE_BUS 2
static uint64_t cpu_alpha_superpage_to_phys(void *opaque, uint64_t addr)
{
if (((addr >> 41) & 3) == 2) {
addr &= 0xffffffffffull;
}
return addr;
}
/* Note that there are at least 3 viewpoints of IRQ numbers on Alpha systems.
(0) The dev_irq_n lines into the cpu, which we totally ignore,
(1) The DRIR lines in the typhoon chipset,
(2) The "vector" aka mangled interrupt number reported by SRM PALcode,
(3) The interrupt number assigned by the kernel.
The following function is concerned with (1) only. */
static int clipper_pci_map_irq(PCIDevice *d, int irq_num)
{
int slot = d->devfn >> 3;
assert(irq_num >= 0 && irq_num <= 3);
return (slot + 1) * 4 + irq_num;
}
static void clipper_init(MachineState *machine)
{
ram_addr_t ram_size = machine->ram_size;
const char *kernel_filename = machine->kernel_filename;
const char *kernel_cmdline = machine->kernel_cmdline;
const char *initrd_filename = machine->initrd_filename;
AlphaCPU *cpus[4];
PCIBus *pci_bus;
ISABus *isa_bus;
qemu_irq rtc_irq;
long size, i;
char *palcode_filename;
uint64_t palcode_entry, palcode_low, palcode_high;
uint64_t kernel_entry, kernel_low, kernel_high;
/* Create up to 4 cpus. */
memset(cpus, 0, sizeof(cpus));
for (i = 0; i < smp_cpus; ++i) {
cpus[i] = ALPHA_CPU(cpu_create(machine->cpu_type));
}
cpus[0]->env.trap_arg0 = ram_size;
cpus[0]->env.trap_arg1 = 0;
cpus[0]->env.trap_arg2 = smp_cpus;
/* Init the chipset. */
pci_bus = typhoon_init(ram_size, &isa_bus, &rtc_irq, cpus,
clipper_pci_map_irq);
/* Since we have an SRM-compatible PALcode, use the SRM epoch. */
mc146818_rtc_init(isa_bus, 1900, rtc_irq);
i8254_pit_init(isa_bus, 0x40, 0, NULL);
/* VGA setup. Don't bother loading the bios. */
pci_vga_init(pci_bus);
/* Network setup. e1000 is good enough, failing Tulip support. */
for (i = 0; i < nb_nics; i++) {
pci_nic_init_nofail(&nd_table[i], pci_bus, "e1000", NULL);
}
/* 2 82C37 (dma) */
isa_create_simple(isa_bus, "i82374");
/* Super I/O */
isa_create_simple(isa_bus, TYPE_SMC37C669_SUPERIO);
/* IDE disk setup. */
{
DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
ide_drive_get(hd, ARRAY_SIZE(hd));
pci_cmd646_ide_init(pci_bus, hd, 0);
}
/* Load PALcode. Given that this is not "real" cpu palcode,
but one explicitly written for the emulation, we might as
well load it directly from and ELF image. */
palcode_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
bios_name ? bios_name : "palcode-clipper");
if (palcode_filename == NULL) {
error_report("no palcode provided");
exit(1);
}
size = load_elf(palcode_filename, cpu_alpha_superpage_to_phys,
NULL, &palcode_entry, &palcode_low, &palcode_high,
0, EM_ALPHA, 0, 0);
if (size < 0) {
error_report("could not load palcode '%s'", palcode_filename);
exit(1);
}
g_free(palcode_filename);
/* Start all cpus at the PALcode RESET entry point. */
for (i = 0; i < smp_cpus; ++i) {
cpus[i]->env.pc = palcode_entry;
cpus[i]->env.palbr = palcode_entry;
}
/* Load a kernel. */
if (kernel_filename) {
uint64_t param_offset;
size = load_elf(kernel_filename, cpu_alpha_superpage_to_phys,
NULL, &kernel_entry, &kernel_low, &kernel_high,
0, EM_ALPHA, 0, 0);
if (size < 0) {
error_report("could not load kernel '%s'", kernel_filename);
exit(1);
}
cpus[0]->env.trap_arg1 = kernel_entry;
param_offset = kernel_low - 0x6000;
if (kernel_cmdline) {
pstrcpy_targphys("cmdline", param_offset, 0x100, kernel_cmdline);
}
if (initrd_filename) {
long initrd_base;
int64_t initrd_size;
initrd_size = get_image_size(initrd_filename);
if (initrd_size < 0) {
error_report("could not load initial ram disk '%s'",
initrd_filename);
exit(1);
}
/* Put the initrd image as high in memory as possible. */
initrd_base = (ram_size - initrd_size) & TARGET_PAGE_MASK;
load_image_targphys(initrd_filename, initrd_base,
ram_size - initrd_base);
Switch non-CPU callers from ld/st*_phys to address_space_ld/st* Switch all the uses of ld/st*_phys to address_space_ld/st*, except for those cases where the address space is the CPU's (ie cs->as). This was done with the following script which generates a Coccinelle patch. A few over-80-columns lines in the result were rewrapped by hand where Coccinelle failed to do the wrapping automatically, as well as one location where it didn't put a line-continuation '\' when wrapping lines on a change made to a match inside a macro definition. ===begin=== #!/bin/sh -e # Usage: # ./ldst-phys.spatch.sh > ldst-phys.spatch # spatch -sp_file ldst-phys.spatch -dir . | sed -e '/^+/s/\t/ /g' > out.patch # patch -p1 < out.patch for FN in ub uw_le uw_be l_le l_be q_le q_be uw l q; do cat <<EOF @ cpu_matches_ld_${FN} @ expression E1,E2; identifier as; @@ ld${FN}_phys(E1->as,E2) @ other_matches_ld_${FN} depends on !cpu_matches_ld_${FN} @ expression E1,E2; @@ -ld${FN}_phys(E1,E2) +address_space_ld${FN}(E1,E2, MEMTXATTRS_UNSPECIFIED, NULL) EOF done for FN in b w_le w_be l_le l_be q_le q_be w l q; do cat <<EOF @ cpu_matches_st_${FN} @ expression E1,E2,E3; identifier as; @@ st${FN}_phys(E1->as,E2,E3) @ other_matches_st_${FN} depends on !cpu_matches_st_${FN} @ expression E1,E2,E3; @@ -st${FN}_phys(E1,E2,E3) +address_space_st${FN}(E1,E2,E3, MEMTXATTRS_UNSPECIFIED, NULL) EOF done ===endit=== Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
2015-04-26 17:49:24 +02:00
address_space_stq(&address_space_memory, param_offset + 0x100,
initrd_base + 0xfffffc0000000000ULL,
MEMTXATTRS_UNSPECIFIED,
NULL);
address_space_stq(&address_space_memory, param_offset + 0x108,
initrd_size, MEMTXATTRS_UNSPECIFIED, NULL);
}
}
}
static void clipper_machine_init(MachineClass *mc)
{
mc->desc = "Alpha DP264/CLIPPER";
mc->init = clipper_init;
mc->block_default_type = IF_IDE;
mc->max_cpus = 4;
mc->is_default = 1;
mc->default_cpu_type = ALPHA_CPU_TYPE_NAME("ev67");
}
DEFINE_MACHINE("clipper", clipper_machine_init)