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-rw-r--r--hw/ppc/vof.c1053
1 files changed, 1053 insertions, 0 deletions
diff --git a/hw/ppc/vof.c b/hw/ppc/vof.c
new file mode 100644
index 0000000000..81f6596215
--- /dev/null
+++ b/hw/ppc/vof.c
@@ -0,0 +1,1053 @@
+/*
+ * QEMU PowerPC Virtual Open Firmware.
+ *
+ * This implements client interface from OpenFirmware IEEE1275 on the QEMU
+ * side to leave only a very basic firmware in the VM.
+ *
+ * Copyright (c) 2021 IBM Corporation.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "qemu/timer.h"
+#include "qemu/range.h"
+#include "qemu/units.h"
+#include "qemu/log.h"
+#include "qapi/error.h"
+#include "exec/ram_addr.h"
+#include "exec/address-spaces.h"
+#include "hw/ppc/vof.h"
+#include "hw/ppc/fdt.h"
+#include "sysemu/runstate.h"
+#include "qom/qom-qobject.h"
+#include "trace.h"
+
+#include <libfdt.h>
+
+/*
+ * OF 1275 "nextprop" description suggests is it 32 bytes max but
+ * LoPAPR defines "ibm,query-interrupt-source-number" which is 33 chars long.
+ */
+#define OF_PROPNAME_LEN_MAX 64
+
+#define VOF_MAX_PATH 256
+#define VOF_MAX_SETPROPLEN 2048
+#define VOF_MAX_METHODLEN 256
+#define VOF_MAX_FORTHCODE 256
+#define VOF_VTY_BUF_SIZE 256
+
+typedef struct {
+ uint64_t start;
+ uint64_t size;
+} OfClaimed;
+
+typedef struct {
+ char *path; /* the path used to open the instance */
+ uint32_t phandle;
+} OfInstance;
+
+static int readstr(hwaddr pa, char *buf, int size)
+{
+ if (VOF_MEM_READ(pa, buf, size) != MEMTX_OK) {
+ return -1;
+ }
+ if (strnlen(buf, size) == size) {
+ buf[size - 1] = '\0';
+ trace_vof_error_str_truncated(buf, size);
+ return -1;
+ }
+ return 0;
+}
+
+static bool cmpservice(const char *s, unsigned nargs, unsigned nret,
+ const char *s1, unsigned nargscheck, unsigned nretcheck)
+{
+ if (strcmp(s, s1)) {
+ return false;
+ }
+ if ((nargscheck && (nargs != nargscheck)) ||
+ (nretcheck && (nret != nretcheck))) {
+ trace_vof_error_param(s, nargscheck, nretcheck, nargs, nret);
+ return false;
+ }
+
+ return true;
+}
+
+static void prop_format(char *tval, int tlen, const void *prop, int len)
+{
+ int i;
+ const unsigned char *c;
+ char *t;
+ const char bin[] = "...";
+
+ for (i = 0, c = prop; i < len; ++i, ++c) {
+ if (*c == '\0' && i == len - 1) {
+ strncpy(tval, prop, tlen - 1);
+ return;
+ }
+ if (*c < 0x20 || *c >= 0x80) {
+ break;
+ }
+ }
+
+ for (i = 0, c = prop, t = tval; i < len; ++i, ++c) {
+ if (t >= tval + tlen - sizeof(bin) - 1 - 2 - 1) {
+ strcpy(t, bin);
+ return;
+ }
+ if (i && i % 4 == 0 && i != len - 1) {
+ strcat(t, " ");
+ ++t;
+ }
+ t += sprintf(t, "%02X", *c & 0xFF);
+ }
+}
+
+static int get_path(const void *fdt, int offset, char *buf, int len)
+{
+ int ret;
+
+ ret = fdt_get_path(fdt, offset, buf, len - 1);
+ if (ret < 0) {
+ return ret;
+ }
+
+ buf[len - 1] = '\0';
+
+ return strlen(buf) + 1;
+}
+
+static int phandle_to_path(const void *fdt, uint32_t ph, char *buf, int len)
+{
+ int ret;
+
+ ret = fdt_node_offset_by_phandle(fdt, ph);
+ if (ret < 0) {
+ return ret;
+ }
+
+ return get_path(fdt, ret, buf, len);
+}
+
+static int path_offset(const void *fdt, const char *path)
+{
+ g_autofree char *p = NULL;
+ char *at;
+
+ /*
+ * https://www.devicetree.org/open-firmware/bindings/ppc/release/ppc-2_1.html#HDR16
+ *
+ * "Conversion from numeric representation to text representation shall use
+ * the lower case forms of the hexadecimal digits in the range a..f,
+ * suppressing leading zeros".
+ */
+ p = g_strdup(path);
+ for (at = strchr(p, '@'); at && *at; ) {
+ if (*at == '/') {
+ at = strchr(at, '@');
+ } else {
+ *at = tolower(*at);
+ ++at;
+ }
+ }
+
+ return fdt_path_offset(fdt, p);
+}
+
+static uint32_t vof_finddevice(const void *fdt, uint32_t nodeaddr)
+{
+ char fullnode[VOF_MAX_PATH];
+ uint32_t ret = -1;
+ int offset;
+
+ if (readstr(nodeaddr, fullnode, sizeof(fullnode))) {
+ return (uint32_t) ret;
+ }
+
+ offset = path_offset(fdt, fullnode);
+ if (offset >= 0) {
+ ret = fdt_get_phandle(fdt, offset);
+ }
+ trace_vof_finddevice(fullnode, ret);
+ return (uint32_t) ret;
+}
+
+static const void *getprop(const void *fdt, int nodeoff, const char *propname,
+ int *proplen, bool *write0)
+{
+ const char *unit, *prop;
+ const void *ret = fdt_getprop(fdt, nodeoff, propname, proplen);
+
+ if (ret) {
+ if (write0) {
+ *write0 = false;
+ }
+ return ret;
+ }
+
+ if (strcmp(propname, "name")) {
+ return NULL;
+ }
+ /*
+ * We return a value for "name" from path if queried but property does not
+ * exist. @proplen does not include the unit part in this case.
+ */
+ prop = fdt_get_name(fdt, nodeoff, proplen);
+ if (!prop) {
+ *proplen = 0;
+ return NULL;
+ }
+
+ unit = memchr(prop, '@', *proplen);
+ if (unit) {
+ *proplen = unit - prop;
+ }
+ *proplen += 1;
+
+ /*
+ * Since it might be cut at "@" and there will be no trailing zero
+ * in the prop buffer, tell the caller to write zero at the end.
+ */
+ if (write0) {
+ *write0 = true;
+ }
+ return prop;
+}
+
+static uint32_t vof_getprop(const void *fdt, uint32_t nodeph, uint32_t pname,
+ uint32_t valaddr, uint32_t vallen)
+{
+ char propname[OF_PROPNAME_LEN_MAX + 1];
+ uint32_t ret = 0;
+ int proplen = 0;
+ const void *prop;
+ char trval[64] = "";
+ int nodeoff = fdt_node_offset_by_phandle(fdt, nodeph);
+ bool write0;
+
+ if (nodeoff < 0) {
+ return -1;
+ }
+ if (readstr(pname, propname, sizeof(propname))) {
+ return -1;
+ }
+ prop = getprop(fdt, nodeoff, propname, &proplen, &write0);
+ if (prop) {
+ const char zero = 0;
+ int cb = MIN(proplen, vallen);
+
+ if (VOF_MEM_WRITE(valaddr, prop, cb) != MEMTX_OK ||
+ /* if that was "name" with a unit address, overwrite '@' with '0' */
+ (write0 &&
+ cb == proplen &&
+ VOF_MEM_WRITE(valaddr + cb - 1, &zero, 1) != MEMTX_OK)) {
+ ret = -1;
+ } else {
+ /*
+ * OF1275 says:
+ * "Size is either the actual size of the property, or -1 if name
+ * does not exist", hence returning proplen instead of cb.
+ */
+ ret = proplen;
+ /* Do not format a value if tracepoint is silent, for performance */
+ if (trace_event_get_state(TRACE_VOF_GETPROP) &&
+ qemu_loglevel_mask(LOG_TRACE)) {
+ prop_format(trval, sizeof(trval), prop, ret);
+ }
+ }
+ } else {
+ ret = -1;
+ }
+ trace_vof_getprop(nodeph, propname, ret, trval);
+
+ return ret;
+}
+
+static uint32_t vof_getproplen(const void *fdt, uint32_t nodeph, uint32_t pname)
+{
+ char propname[OF_PROPNAME_LEN_MAX + 1];
+ uint32_t ret = 0;
+ int proplen = 0;
+ const void *prop;
+ int nodeoff = fdt_node_offset_by_phandle(fdt, nodeph);
+
+ if (nodeoff < 0) {
+ return -1;
+ }
+ if (readstr(pname, propname, sizeof(propname))) {
+ return -1;
+ }
+ prop = getprop(fdt, nodeoff, propname, &proplen, NULL);
+ if (prop) {
+ ret = proplen;
+ } else {
+ ret = -1;
+ }
+ trace_vof_getproplen(nodeph, propname, ret);
+
+ return ret;
+}
+
+static uint32_t vof_setprop(MachineState *ms, void *fdt, Vof *vof,
+ uint32_t nodeph, uint32_t pname,
+ uint32_t valaddr, uint32_t vallen)
+{
+ char propname[OF_PROPNAME_LEN_MAX + 1];
+ uint32_t ret = -1;
+ int offset;
+ char trval[64] = "";
+ char nodepath[VOF_MAX_PATH] = "";
+ Object *vmo = object_dynamic_cast(OBJECT(ms), TYPE_VOF_MACHINE_IF);
+ VofMachineIfClass *vmc;
+ g_autofree char *val = NULL;
+
+ if (vallen > VOF_MAX_SETPROPLEN) {
+ goto trace_exit;
+ }
+ if (readstr(pname, propname, sizeof(propname))) {
+ goto trace_exit;
+ }
+ offset = fdt_node_offset_by_phandle(fdt, nodeph);
+ if (offset < 0) {
+ goto trace_exit;
+ }
+ ret = get_path(fdt, offset, nodepath, sizeof(nodepath));
+ if (ret <= 0) {
+ goto trace_exit;
+ }
+
+ val = g_malloc0(vallen);
+ if (VOF_MEM_READ(valaddr, val, vallen) != MEMTX_OK) {
+ goto trace_exit;
+ }
+
+ if (!vmo) {
+ goto trace_exit;
+ }
+
+ vmc = VOF_MACHINE_GET_CLASS(vmo);
+ if (!vmc->setprop || !vmc->setprop(ms, nodepath, propname, val, vallen)) {
+ goto trace_exit;
+ }
+
+ ret = fdt_setprop(fdt, offset, propname, val, vallen);
+ if (ret) {
+ goto trace_exit;
+ }
+
+ if (trace_event_get_state(TRACE_VOF_SETPROP) &&
+ qemu_loglevel_mask(LOG_TRACE)) {
+ prop_format(trval, sizeof(trval), val, vallen);
+ }
+ ret = vallen;
+
+trace_exit:
+ trace_vof_setprop(nodeph, propname, trval, vallen, ret);
+
+ return ret;
+}
+
+static uint32_t vof_nextprop(const void *fdt, uint32_t phandle,
+ uint32_t prevaddr, uint32_t nameaddr)
+{
+ int offset, nodeoff = fdt_node_offset_by_phandle(fdt, phandle);
+ char prev[OF_PROPNAME_LEN_MAX + 1];
+ const char *tmp;
+
+ if (readstr(prevaddr, prev, sizeof(prev))) {
+ return -1;
+ }
+
+ fdt_for_each_property_offset(offset, fdt, nodeoff) {
+ if (!fdt_getprop_by_offset(fdt, offset, &tmp, NULL)) {
+ return 0;
+ }
+ if (prev[0] == '\0' || strcmp(prev, tmp) == 0) {
+ if (prev[0] != '\0') {
+ offset = fdt_next_property_offset(fdt, offset);
+ if (offset < 0) {
+ return 0;
+ }
+ }
+ if (!fdt_getprop_by_offset(fdt, offset, &tmp, NULL)) {
+ return 0;
+ }
+
+ if (VOF_MEM_WRITE(nameaddr, tmp, strlen(tmp) + 1) != MEMTX_OK) {
+ return -1;
+ }
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static uint32_t vof_peer(const void *fdt, uint32_t phandle)
+{
+ int ret;
+
+ if (phandle == 0) {
+ ret = fdt_path_offset(fdt, "/");
+ } else {
+ ret = fdt_next_subnode(fdt, fdt_node_offset_by_phandle(fdt, phandle));
+ }
+
+ if (ret < 0) {
+ ret = 0;
+ } else {
+ ret = fdt_get_phandle(fdt, ret);
+ }
+
+ return ret;
+}
+
+static uint32_t vof_child(const void *fdt, uint32_t phandle)
+{
+ int ret = fdt_first_subnode(fdt, fdt_node_offset_by_phandle(fdt, phandle));
+
+ if (ret < 0) {
+ ret = 0;
+ } else {
+ ret = fdt_get_phandle(fdt, ret);
+ }
+
+ return ret;
+}
+
+static uint32_t vof_parent(const void *fdt, uint32_t phandle)
+{
+ int ret = fdt_parent_offset(fdt, fdt_node_offset_by_phandle(fdt, phandle));
+
+ if (ret < 0) {
+ ret = 0;
+ } else {
+ ret = fdt_get_phandle(fdt, ret);
+ }
+
+ return ret;
+}
+
+static uint32_t vof_do_open(void *fdt, Vof *vof, int offset, const char *path)
+{
+ uint32_t ret = -1;
+ OfInstance *inst = NULL;
+
+ if (vof->of_instance_last == 0xFFFFFFFF) {
+ /* We do not recycle ihandles yet */
+ goto trace_exit;
+ }
+
+ inst = g_new0(OfInstance, 1);
+ inst->phandle = fdt_get_phandle(fdt, offset);
+ g_assert(inst->phandle);
+ ++vof->of_instance_last;
+
+ inst->path = g_strdup(path);
+ g_hash_table_insert(vof->of_instances,
+ GINT_TO_POINTER(vof->of_instance_last),
+ inst);
+ ret = vof->of_instance_last;
+
+trace_exit:
+ trace_vof_open(path, inst ? inst->phandle : 0, ret);
+
+ return ret;
+}
+
+uint32_t vof_client_open_store(void *fdt, Vof *vof, const char *nodename,
+ const char *prop, const char *path)
+{
+ int node = fdt_path_offset(fdt, nodename);
+ int inst, offset;
+
+ offset = fdt_path_offset(fdt, path);
+ if (offset < 0) {
+ trace_vof_error_unknown_path(path);
+ return offset;
+ }
+
+ inst = vof_do_open(fdt, vof, offset, path);
+
+ return fdt_setprop_cell(fdt, node, prop, inst);
+}
+
+static uint32_t vof_open(void *fdt, Vof *vof, uint32_t pathaddr)
+{
+ char path[VOF_MAX_PATH];
+ int offset;
+
+ if (readstr(pathaddr, path, sizeof(path))) {
+ return -1;
+ }
+
+ offset = path_offset(fdt, path);
+ if (offset < 0) {
+ trace_vof_error_unknown_path(path);
+ return offset;
+ }
+
+ return vof_do_open(fdt, vof, offset, path);
+}
+
+static void vof_close(Vof *vof, uint32_t ihandle)
+{
+ if (!g_hash_table_remove(vof->of_instances, GINT_TO_POINTER(ihandle))) {
+ trace_vof_error_unknown_ihandle_close(ihandle);
+ }
+}
+
+static uint32_t vof_instance_to_package(Vof *vof, uint32_t ihandle)
+{
+ gpointer instp = g_hash_table_lookup(vof->of_instances,
+ GINT_TO_POINTER(ihandle));
+ uint32_t ret = -1;
+
+ if (instp) {
+ ret = ((OfInstance *)instp)->phandle;
+ }
+ trace_vof_instance_to_package(ihandle, ret);
+
+ return ret;
+}
+
+static uint32_t vof_package_to_path(const void *fdt, uint32_t phandle,
+ uint32_t buf, uint32_t len)
+{
+ uint32_t ret = -1;
+ char tmp[VOF_MAX_PATH] = "";
+
+ ret = phandle_to_path(fdt, phandle, tmp, sizeof(tmp));
+ if (ret > 0) {
+ if (VOF_MEM_WRITE(buf, tmp, ret) != MEMTX_OK) {
+ ret = -1;
+ }
+ }
+
+ trace_vof_package_to_path(phandle, tmp, ret);
+
+ return ret;
+}
+
+static uint32_t vof_instance_to_path(void *fdt, Vof *vof, uint32_t ihandle,
+ uint32_t buf, uint32_t len)
+{
+ uint32_t ret = -1;
+ uint32_t phandle = vof_instance_to_package(vof, ihandle);
+ char tmp[VOF_MAX_PATH] = "";
+
+ if (phandle != -1) {
+ ret = phandle_to_path(fdt, phandle, tmp, sizeof(tmp));
+ if (ret > 0) {
+ if (VOF_MEM_WRITE(buf, tmp, ret) != MEMTX_OK) {
+ ret = -1;
+ }
+ }
+ }
+ trace_vof_instance_to_path(ihandle, phandle, tmp, ret);
+
+ return ret;
+}
+
+static uint32_t vof_write(Vof *vof, uint32_t ihandle, uint32_t buf,
+ uint32_t len)
+{
+ char tmp[VOF_VTY_BUF_SIZE];
+ unsigned cb;
+ OfInstance *inst = (OfInstance *)
+ g_hash_table_lookup(vof->of_instances, GINT_TO_POINTER(ihandle));
+
+ if (!inst) {
+ trace_vof_error_write(ihandle);
+ return -1;
+ }
+
+ for ( ; len > 0; len -= cb) {
+ cb = MIN(len, sizeof(tmp) - 1);
+ if (VOF_MEM_READ(buf, tmp, cb) != MEMTX_OK) {
+ return -1;
+ }
+
+ /* FIXME: there is no backend(s) yet so just call a trace */
+ if (trace_event_get_state(TRACE_VOF_WRITE) &&
+ qemu_loglevel_mask(LOG_TRACE)) {
+ tmp[cb] = '\0';
+ trace_vof_write(ihandle, cb, tmp);
+ }
+ }
+
+ return len;
+}
+
+static void vof_claimed_dump(GArray *claimed)
+{
+ int i;
+ OfClaimed c;
+
+ if (trace_event_get_state(TRACE_VOF_CLAIMED) &&
+ qemu_loglevel_mask(LOG_TRACE)) {
+
+ for (i = 0; i < claimed->len; ++i) {
+ c = g_array_index(claimed, OfClaimed, i);
+ trace_vof_claimed(c.start, c.start + c.size, c.size);
+ }
+ }
+}
+
+static bool vof_claim_avail(GArray *claimed, uint64_t virt, uint64_t size)
+{
+ int i;
+ OfClaimed c;
+
+ for (i = 0; i < claimed->len; ++i) {
+ c = g_array_index(claimed, OfClaimed, i);
+ if (ranges_overlap(c.start, c.size, virt, size)) {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+static void vof_claim_add(GArray *claimed, uint64_t virt, uint64_t size)
+{
+ OfClaimed newclaim;
+
+ newclaim.start = virt;
+ newclaim.size = size;
+ g_array_append_val(claimed, newclaim);
+}
+
+static gint of_claimed_compare_func(gconstpointer a, gconstpointer b)
+{
+ return ((OfClaimed *)a)->start - ((OfClaimed *)b)->start;
+}
+
+static void vof_dt_memory_available(void *fdt, GArray *claimed, uint64_t base)
+{
+ int i, n, offset, proplen = 0, sc, ac;
+ target_ulong mem0_end;
+ const uint8_t *mem0_reg;
+ g_autofree uint8_t *avail = NULL;
+ uint8_t *availcur;
+
+ if (!fdt || !claimed) {
+ return;
+ }
+
+ offset = fdt_path_offset(fdt, "/");
+ _FDT(offset);
+ ac = fdt_address_cells(fdt, offset);
+ g_assert(ac == 1 || ac == 2);
+ sc = fdt_size_cells(fdt, offset);
+ g_assert(sc == 1 || sc == 2);
+
+ offset = fdt_path_offset(fdt, "/memory@0");
+ _FDT(offset);
+
+ mem0_reg = fdt_getprop(fdt, offset, "reg", &proplen);
+ g_assert(mem0_reg && proplen == sizeof(uint32_t) * (ac + sc));
+ if (sc == 2) {
+ mem0_end = be64_to_cpu(*(uint64_t *)(mem0_reg + sizeof(uint32_t) * ac));
+ } else {
+ mem0_end = be32_to_cpu(*(uint32_t *)(mem0_reg + sizeof(uint32_t) * ac));
+ }
+
+ g_array_sort(claimed, of_claimed_compare_func);
+ vof_claimed_dump(claimed);
+
+ /*
+ * VOF resides in the first page so we do not need to check if there is
+ * available memory before the first claimed block
+ */
+ g_assert(claimed->len && (g_array_index(claimed, OfClaimed, 0).start == 0));
+
+ avail = g_malloc0(sizeof(uint32_t) * (ac + sc) * claimed->len);
+ for (i = 0, n = 0, availcur = avail; i < claimed->len; ++i) {
+ OfClaimed c = g_array_index(claimed, OfClaimed, i);
+ uint64_t start, size;
+
+ start = c.start + c.size;
+ if (i < claimed->len - 1) {
+ OfClaimed cn = g_array_index(claimed, OfClaimed, i + 1);
+
+ size = cn.start - start;
+ } else {
+ size = mem0_end - start;
+ }
+
+ if (ac == 2) {
+ *(uint64_t *) availcur = cpu_to_be64(start);
+ } else {
+ *(uint32_t *) availcur = cpu_to_be32(start);
+ }
+ availcur += sizeof(uint32_t) * ac;
+ if (sc == 2) {
+ *(uint64_t *) availcur = cpu_to_be64(size);
+ } else {
+ *(uint32_t *) availcur = cpu_to_be32(size);
+ }
+ availcur += sizeof(uint32_t) * sc;
+
+ if (size) {
+ trace_vof_avail(c.start + c.size, c.start + c.size + size, size);
+ ++n;
+ }
+ }
+ _FDT((fdt_setprop(fdt, offset, "available", avail, availcur - avail)));
+}
+
+/*
+ * OF1275:
+ * "Allocates size bytes of memory. If align is zero, the allocated range
+ * begins at the virtual address virt. Otherwise, an aligned address is
+ * automatically chosen and the input argument virt is ignored".
+ *
+ * In other words, exactly one of @virt and @align is non-zero.
+ */
+uint64_t vof_claim(Vof *vof, uint64_t virt, uint64_t size,
+ uint64_t align)
+{
+ uint64_t ret;
+
+ if (size == 0) {
+ ret = -1;
+ } else if (align == 0) {
+ if (!vof_claim_avail(vof->claimed, virt, size)) {
+ ret = -1;
+ } else {
+ ret = virt;
+ }
+ } else {
+ vof->claimed_base = QEMU_ALIGN_UP(vof->claimed_base, align);
+ while (1) {
+ if (vof->claimed_base >= vof->top_addr) {
+ error_report("Out of RMA memory for the OF client");
+ return -1;
+ }
+ if (vof_claim_avail(vof->claimed, vof->claimed_base, size)) {
+ break;
+ }
+ vof->claimed_base += size;
+ }
+ ret = vof->claimed_base;
+ }
+
+ if (ret != -1) {
+ vof->claimed_base = MAX(vof->claimed_base, ret + size);
+ vof_claim_add(vof->claimed, ret, size);
+ }
+ trace_vof_claim(virt, size, align, ret);
+
+ return ret;
+}
+
+static uint32_t vof_release(Vof *vof, uint64_t virt, uint64_t size)
+{
+ uint32_t ret = -1;
+ int i;
+ GArray *claimed = vof->claimed;
+ OfClaimed c;
+
+ for (i = 0; i < claimed->len; ++i) {
+ c = g_array_index(claimed, OfClaimed, i);
+ if (c.start == virt && c.size == size) {
+ g_array_remove_index(claimed, i);
+ ret = 0;
+ break;
+ }
+ }
+
+ trace_vof_release(virt, size, ret);
+
+ return ret;
+}
+
+static void vof_instantiate_rtas(Error **errp)
+{
+ error_setg(errp, "The firmware should have instantiated RTAS");
+}
+
+static uint32_t vof_call_method(MachineState *ms, Vof *vof, uint32_t methodaddr,
+ uint32_t ihandle, uint32_t param1,
+ uint32_t param2, uint32_t param3,
+ uint32_t param4, uint32_t *ret2)
+{
+ uint32_t ret = -1;
+ char method[VOF_MAX_METHODLEN] = "";
+ OfInstance *inst;
+
+ if (!ihandle) {
+ goto trace_exit;
+ }
+
+ inst = (OfInstance *)g_hash_table_lookup(vof->of_instances,
+ GINT_TO_POINTER(ihandle));
+ if (!inst) {
+ goto trace_exit;
+ }
+
+ if (readstr(methodaddr, method, sizeof(method))) {
+ goto trace_exit;
+ }
+
+ if (strcmp(inst->path, "/") == 0) {
+ if (strcmp(method, "ibm,client-architecture-support") == 0) {
+ Object *vmo = object_dynamic_cast(OBJECT(ms), TYPE_VOF_MACHINE_IF);
+
+ if (vmo) {
+ VofMachineIfClass *vmc = VOF_MACHINE_GET_CLASS(vmo);
+
+ g_assert(vmc->client_architecture_support);
+ ret = vmc->client_architecture_support(ms, first_cpu, param1);
+ }
+
+ *ret2 = 0;
+ }
+ } else if (strcmp(inst->path, "/rtas") == 0) {
+ if (strcmp(method, "instantiate-rtas") == 0) {
+ vof_instantiate_rtas(&error_fatal);
+ ret = 0;
+ *ret2 = param1; /* rtas-base */
+ }
+ } else {
+ trace_vof_error_unknown_method(method);
+ }
+
+trace_exit:
+ trace_vof_method(ihandle, method, param1, ret, *ret2);
+
+ return ret;
+}
+
+static uint32_t vof_call_interpret(uint32_t cmdaddr, uint32_t param1,
+ uint32_t param2, uint32_t *ret2)
+{
+ uint32_t ret = -1;
+ char cmd[VOF_MAX_FORTHCODE] = "";
+
+ /* No interpret implemented so just call a trace */
+ readstr(cmdaddr, cmd, sizeof(cmd));
+ trace_vof_interpret(cmd, param1, param2, ret, *ret2);
+
+ return ret;
+}
+
+static void vof_quiesce(MachineState *ms, void *fdt, Vof *vof)
+{
+ Object *vmo = object_dynamic_cast(OBJECT(ms), TYPE_VOF_MACHINE_IF);
+ /* After "quiesce", no change is expected to the FDT, pack FDT to ensure */
+ int rc = fdt_pack(fdt);
+
+ assert(rc == 0);
+
+ if (vmo) {
+ VofMachineIfClass *vmc = VOF_MACHINE_GET_CLASS(vmo);
+
+ if (vmc->quiesce) {
+ vmc->quiesce(ms);
+ }
+ }
+
+ vof_claimed_dump(vof->claimed);
+}
+
+static uint32_t vof_client_handle(MachineState *ms, void *fdt, Vof *vof,
+ const char *service,
+ uint32_t *args, unsigned nargs,
+ uint32_t *rets, unsigned nrets)
+{
+ uint32_t ret = 0;
+
+ /* @nrets includes the value which this function returns */
+#define cmpserv(s, a, r) \
+ cmpservice(service, nargs, nrets, (s), (a), (r))
+
+ if (cmpserv("finddevice", 1, 1)) {
+ ret = vof_finddevice(fdt, args[0]);
+ } else if (cmpserv("getprop", 4, 1)) {
+ ret = vof_getprop(fdt, args[0], args[1], args[2], args[3]);
+ } else if (cmpserv("getproplen", 2, 1)) {
+ ret = vof_getproplen(fdt, args[0], args[1]);
+ } else if (cmpserv("setprop", 4, 1)) {
+ ret = vof_setprop(ms, fdt, vof, args[0], args[1], args[2], args[3]);
+ } else if (cmpserv("nextprop", 3, 1)) {
+ ret = vof_nextprop(fdt, args[0], args[1], args[2]);
+ } else if (cmpserv("peer", 1, 1)) {
+ ret = vof_peer(fdt, args[0]);
+ } else if (cmpserv("child", 1, 1)) {
+ ret = vof_child(fdt, args[0]);
+ } else if (cmpserv("parent", 1, 1)) {
+ ret = vof_parent(fdt, args[0]);
+ } else if (cmpserv("open", 1, 1)) {
+ ret = vof_open(fdt, vof, args[0]);
+ } else if (cmpserv("close", 1, 0)) {
+ vof_close(vof, args[0]);
+ } else if (cmpserv("instance-to-package", 1, 1)) {
+ ret = vof_instance_to_package(vof, args[0]);
+ } else if (cmpserv("package-to-path", 3, 1)) {
+ ret = vof_package_to_path(fdt, args[0], args[1], args[2]);
+ } else if (cmpserv("instance-to-path", 3, 1)) {
+ ret = vof_instance_to_path(fdt, vof, args[0], args[1], args[2]);
+ } else if (cmpserv("write", 3, 1)) {
+ ret = vof_write(vof, args[0], args[1], args[2]);
+ } else if (cmpserv("claim", 3, 1)) {
+ ret = vof_claim(vof, args[0], args[1], args[2]);
+ if (ret != -1) {
+ vof_dt_memory_available(fdt, vof->claimed, vof->claimed_base);
+ }
+ } else if (cmpserv("release", 2, 0)) {
+ ret = vof_release(vof, args[0], args[1]);
+ if (ret != -1) {
+ vof_dt_memory_available(fdt, vof->claimed, vof->claimed_base);
+ }
+ } else if (cmpserv("call-method", 0, 0)) {
+ ret = vof_call_method(ms, vof, args[0], args[1], args[2], args[3],
+ args[4], args[5], rets);
+ } else if (cmpserv("interpret", 0, 0)) {
+ ret = vof_call_interpret(args[0], args[1], args[2], rets);
+ } else if (cmpserv("milliseconds", 0, 1)) {
+ ret = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
+ } else if (cmpserv("quiesce", 0, 0)) {
+ vof_quiesce(ms, fdt, vof);
+ } else if (cmpserv("exit", 0, 0)) {
+ error_report("Stopped as the VM requested \"exit\"");
+ vm_stop(RUN_STATE_PAUSED);
+ } else {
+ trace_vof_error_unknown_service(service, nargs, nrets);
+ ret = -1;
+ }
+
+#undef cmpserv
+
+ return ret;
+}
+
+/* Defined as Big Endian */
+struct prom_args {
+ uint32_t service;
+ uint32_t nargs;
+ uint32_t nret;
+ uint32_t args[10];
+} QEMU_PACKED;
+
+int vof_client_call(MachineState *ms, Vof *vof, void *fdt,
+ target_ulong args_real)
+{
+ struct prom_args args_be;
+ uint32_t args[ARRAY_SIZE(args_be.args)];
+ uint32_t rets[ARRAY_SIZE(args_be.args)] = { 0 }, ret;
+ char service[64];
+ unsigned nargs, nret, i;
+
+ if (VOF_MEM_READ(args_real, &args_be, sizeof(args_be)) != MEMTX_OK) {
+ return -EINVAL;
+ }
+ nargs = be32_to_cpu(args_be.nargs);
+ if (nargs >= ARRAY_SIZE(args_be.args)) {
+ return -EINVAL;
+ }
+
+ if (VOF_MEM_READ(be32_to_cpu(args_be.service), service, sizeof(service)) !=
+ MEMTX_OK) {
+ return -EINVAL;
+ }
+ if (strnlen(service, sizeof(service)) == sizeof(service)) {
+ /* Too long service name */
+ return -EINVAL;
+ }
+
+ for (i = 0; i < nargs; ++i) {
+ args[i] = be32_to_cpu(args_be.args[i]);
+ }
+
+ nret = be32_to_cpu(args_be.nret);
+ ret = vof_client_handle(ms, fdt, vof, service, args, nargs, rets, nret);
+ if (!nret) {
+ return 0;
+ }
+
+ args_be.args[nargs] = cpu_to_be32(ret);
+ for (i = 1; i < nret; ++i) {
+ args_be.args[nargs + i] = cpu_to_be32(rets[i - 1]);
+ }
+
+ if (VOF_MEM_WRITE(args_real + offsetof(struct prom_args, args[nargs]),
+ args_be.args + nargs, sizeof(args_be.args[0]) * nret) !=
+ MEMTX_OK) {
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void vof_instance_free(gpointer data)
+{
+ OfInstance *inst = (OfInstance *)data;
+
+ g_free(inst->path);
+ g_free(inst);
+}
+
+void vof_init(Vof *vof, uint64_t top_addr, Error **errp)
+{
+ vof_cleanup(vof);
+
+ vof->of_instances = g_hash_table_new_full(g_direct_hash, g_direct_equal,
+ NULL, vof_instance_free);
+ vof->claimed = g_array_new(false, false, sizeof(OfClaimed));
+
+ /* Keep allocations in 32bit as CLI ABI can only return cells==32bit */
+ vof->top_addr = MIN(top_addr, 4 * GiB);
+ if (vof_claim(vof, 0, vof->fw_size, 0) == -1) {
+ error_setg(errp, "Memory for firmware is in use");
+ }
+}
+
+void vof_cleanup(Vof *vof)
+{
+ if (vof->claimed) {
+ g_array_unref(vof->claimed);
+ }
+ if (vof->of_instances) {
+ g_hash_table_unref(vof->of_instances);
+ }
+ vof->claimed = NULL;
+ vof->of_instances = NULL;
+}
+
+void vof_build_dt(void *fdt, Vof *vof)
+{
+ uint32_t phandle = fdt_get_max_phandle(fdt);
+ int offset, proplen = 0;
+ const void *prop;
+
+ /* Assign phandles to nodes without predefined phandles (like XICS/XIVE) */
+ for (offset = fdt_next_node(fdt, -1, NULL);
+ offset >= 0;
+ offset = fdt_next_node(fdt, offset, NULL)) {
+ prop = fdt_getprop(fdt, offset, "phandle", &proplen);
+ if (prop) {
+ continue;
+ }
+ ++phandle;
+ _FDT(fdt_setprop_cell(fdt, offset, "phandle", phandle));
+ }
+
+ vof_dt_memory_available(fdt, vof->claimed, vof->claimed_base);
+}
+
+static const TypeInfo vof_machine_if_info = {
+ .name = TYPE_VOF_MACHINE_IF,
+ .parent = TYPE_INTERFACE,
+ .class_size = sizeof(VofMachineIfClass),
+};
+
+static void vof_machine_if_register_types(void)
+{
+ type_register_static(&vof_machine_if_info);
+}
+type_init(vof_machine_if_register_types)
generated by cgit v1.2.3 (git 2.26.2) at 2025-02-06 19:03:55 +0000