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hw/xtensa: xtfpga: use core frequency 

XTFPGA board FPGA peripheral exposes hard-coded 10MHz frequency
regardless of the actual used core frequency. Expose actual core
frequency instead.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov 2019-01-22 13:40:40 -08:00
parent 288a3f2ed7
commit fff7bf1450
1 changed files with 8 additions and 4 deletions
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12
hw/xtensa/xtfpga.c
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@ -61,6 +61,7 @@ typedef struct XtfpgaBoardDesc {
typedef struct XtfpgaFpgaState {
MemoryRegion iomem;
uint32_t freq;
uint32_t leds;
uint32_t switches;
} XtfpgaFpgaState;
@ -83,7 +84,7 @@ static uint64_t xtfpga_fpga_read(void *opaque, hwaddr addr,
return 0x09272011;
case 0x4: /*processor clock frequency, Hz*/
return 10000000;
return s->freq;
case 0x8: /*LEDs (off = 0, on = 1)*/
return s->leds;
@ -119,13 +120,14 @@ static const MemoryRegionOps xtfpga_fpga_ops = {
};
static XtfpgaFpgaState *xtfpga_fpga_init(MemoryRegion *address_space,
hwaddr base)
hwaddr base, uint32_t freq)
{
XtfpgaFpgaState *s = g_malloc(sizeof(XtfpgaFpgaState));
memory_region_init_io(&s->iomem, NULL, &xtfpga_fpga_ops, s,
"xtfpga.fpga", 0x10000);
"xtfpga.fpga", 0x10000);
memory_region_add_subregion(address_space, base, &s->iomem);
s->freq = freq;
xtfpga_fpga_reset(s);
qemu_register_reset(xtfpga_fpga_reset, s);
return s;
@ -231,6 +233,7 @@ static void xtfpga_init(const XtfpgaBoardDesc *board, MachineState *machine)
const char *dtb_filename = qemu_opt_get(machine_opts, "dtb");
const char *initrd_filename = qemu_opt_get(machine_opts, "initrd");
const unsigned system_io_size = 224 * MiB;
uint32_t freq = 10000000;
int n;
for (n = 0; n < smp_cpus; n++) {
@ -240,6 +243,7 @@ static void xtfpga_init(const XtfpgaBoardDesc *board, MachineState *machine)
cenv = &cpu->env;
if (!env) {
env = cenv;
freq = env->config->clock_freq_khz * 1000;
}
cenv->sregs[PRID] = n;
@ -277,7 +281,7 @@ static void xtfpga_init(const XtfpgaBoardDesc *board, MachineState *machine)
system_io, 0, system_io_size);
memory_region_add_subregion(system_memory, board->io[1], io);
}
xtfpga_fpga_init(system_io, 0x0d020000);
xtfpga_fpga_init(system_io, 0x0d020000, freq);
if (nd_table[0].used) {
xtfpga_net_init(system_io, 0x0d030000, 0x0d030400, 0x0d800000,
xtensa_get_extint(env, 1), nd_table);