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/*
* SPAPR machine hooks to Virtual Open Firmware,
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "qapi/error.h"
#include "hw/ppc/spapr.h"
#include "hw/ppc/spapr_vio.h"
#include "hw/ppc/spapr_cpu_core.h"
#include "hw/ppc/fdt.h"
#include "hw/ppc/vof.h"
#include "sysemu/sysemu.h"
#include "qom/qom-qobject.h"
#include "trace.h"
target_ulong spapr_h_vof_client(PowerPCCPU *cpu, SpaprMachineState *spapr,
target_ulong opcode, target_ulong *_args)
{
int ret = vof_client_call(MACHINE(spapr), spapr->vof, spapr->fdt_blob,
ppc64_phys_to_real(_args[0]));
if (ret) {
return H_PARAMETER;
}
return H_SUCCESS;
}
void spapr_vof_client_dt_finalize(SpaprMachineState *spapr, void *fdt)
{
char *stdout_path = spapr_vio_stdout_path(spapr->vio_bus);
vof_build_dt(fdt, spapr->vof);
if (spapr->vof->bootargs) {
int chosen;
_FDT(chosen = fdt_path_offset(fdt, "/chosen"));
/*
* If the client did not change "bootargs", spapr_dt_chosen() must have
* stored machine->kernel_cmdline in it before getting here.
*/
_FDT(fdt_setprop_string(fdt, chosen, "bootargs", spapr->vof->bootargs));
}
/*
* SLOF-less setup requires an open instance of stdout for early
* kernel printk. By now all phandles are settled so we can open
* the default serial console.
*/
if (stdout_path) {
_FDT(vof_client_open_store(fdt, spapr->vof, "/chosen", "stdout",
stdout_path));
}
}
void spapr_vof_reset(SpaprMachineState *spapr, void *fdt, Error **errp)
{
target_ulong stack_ptr;
Vof *vof = spapr->vof;
PowerPCCPU *first_ppc_cpu = POWERPC_CPU(first_cpu);
vof_init(vof, spapr->rma_size, errp);
stack_ptr = vof_claim(vof, 0, VOF_STACK_SIZE, VOF_STACK_SIZE);
if (stack_ptr == -1) {
error_setg(errp, "Memory allocation for stack failed");
return;
}
/* Stack grows downwards plus reserve space for the minimum stack frame */
stack_ptr += VOF_STACK_SIZE - 0x20;
if (spapr->kernel_size &&
vof_claim(vof, spapr->kernel_addr, spapr->kernel_size, 0) == -1) {
error_setg(errp, "Memory for kernel is in use");
return;
}
if (spapr->initrd_size &&
vof_claim(vof, spapr->initrd_base, spapr->initrd_size, 0) == -1) {
error_setg(errp, "Memory for initramdisk is in use");
return;
}
spapr_vof_client_dt_finalize(spapr, fdt);
spapr_cpu_set_entry_state(first_ppc_cpu, SPAPR_ENTRY_POINT,
stack_ptr, spapr->initrd_base,
spapr->initrd_size);
/* VOF is 32bit BE so enforce MSR here */
first_ppc_cpu->env.msr &= ~((1ULL << MSR_SF) | (1ULL << MSR_LE));
/*
* At this point the expected allocation map is:
*
* 0..c38 - the initial firmware
* 8000..10000 - stack
* 400000.. - kernel
* 3ea0000.. - initramdisk
*
* We skip writing FDT as nothing expects it; OF client interface is
* going to be used for reading the device tree.
*/
}
void spapr_vof_quiesce(MachineState *ms)
{
SpaprMachineState *spapr = SPAPR_MACHINE(ms);
spapr->fdt_size = fdt_totalsize(spapr->fdt_blob);
spapr->fdt_initial_size = spapr->fdt_size;
}
bool spapr_vof_setprop(MachineState *ms, const char *path, const char *propname,
void *val, int vallen)
{
SpaprMachineState *spapr = SPAPR_MACHINE(ms);
/*
* We only allow changing properties which we know how to update in QEMU
* OR
* the ones which we know that they need to survive during "quiesce".
*/
if (strcmp(path, "/rtas") == 0) {
if (strcmp(propname, "linux,rtas-base") == 0 ||
strcmp(propname, "linux,rtas-entry") == 0) {
/* These need to survive quiesce so let them store in the FDT */
return true;
}
}
if (strcmp(path, "/chosen") == 0) {
if (strcmp(propname, "bootargs") == 0) {
Vof *vof = spapr->vof;
g_free(vof->bootargs);
vof->bootargs = g_strndup(val, vallen);
return true;
}
if (strcmp(propname, "linux,initrd-start") == 0) {
if (vallen == sizeof(uint32_t)) {
spapr->initrd_base = ldl_be_p(val);
return true;
}
if (vallen == sizeof(uint64_t)) {
spapr->initrd_base = ldq_be_p(val);
return true;
}
return false;
}
if (strcmp(propname, "linux,initrd-end") == 0) {
if (vallen == sizeof(uint32_t)) {
spapr->initrd_size = ldl_be_p(val) - spapr->initrd_base;
return true;
}
if (vallen == sizeof(uint64_t)) {
spapr->initrd_size = ldq_be_p(val) - spapr->initrd_base;
return true;
}
return false;
}
}
return true;
}
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