mirror of https://gitee.com/openkylin/qemu.git
92 lines
1.8 KiB
C
92 lines
1.8 KiB
C
#include "vof.h"
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struct prom_args {
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uint32_t service;
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uint32_t nargs;
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uint32_t nret;
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uint32_t args[10];
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};
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typedef unsigned long prom_arg_t;
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#define ADDR(x) (uint32_t)(x)
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static int prom_handle(struct prom_args *pargs)
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{
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void *rtasbase;
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uint32_t rtassize = 0;
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phandle rtas;
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if (strcmp("call-method", (void *)(unsigned long)pargs->service)) {
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return -1;
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}
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if (strcmp("instantiate-rtas", (void *)(unsigned long)pargs->args[0])) {
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return -1;
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}
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rtas = ci_finddevice("/rtas");
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/* rtas-size is set by QEMU depending of FWNMI support */
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ci_getprop(rtas, "rtas-size", &rtassize, sizeof(rtassize));
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if (rtassize < hv_rtas_size) {
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return -1;
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}
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rtasbase = (void *)(unsigned long) pargs->args[2];
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memcpy(rtasbase, hv_rtas, hv_rtas_size);
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pargs->args[pargs->nargs] = 0;
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pargs->args[pargs->nargs + 1] = pargs->args[2];
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return 0;
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}
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void prom_entry(uint32_t args)
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{
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if (prom_handle((void *)(unsigned long) args)) {
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ci_entry(args);
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}
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}
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static int call_ci(const char *service, int nargs, int nret, ...)
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{
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int i;
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struct prom_args args;
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va_list list;
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args.service = ADDR(service);
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args.nargs = nargs;
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args.nret = nret;
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va_start(list, nret);
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for (i = 0; i < nargs; i++) {
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args.args[i] = va_arg(list, prom_arg_t);
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}
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va_end(list);
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for (i = 0; i < nret; i++) {
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args.args[nargs + i] = 0;
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}
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if (ci_entry((uint32_t)(&args)) < 0) {
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return -1;
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}
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return (nret > 0) ? args.args[nargs] : 0;
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}
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void ci_panic(const char *str)
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{
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call_ci("exit", 0, 0);
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}
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phandle ci_finddevice(const char *path)
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{
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return call_ci("finddevice", 1, 1, path);
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}
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uint32_t ci_getprop(phandle ph, const char *propname, void *prop, int len)
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{
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return call_ci("getprop", 4, 1, ph, propname, prop, len);
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}
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