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hw/arm/raspi: Extract the cores count from the board revision

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The count of ARM cores is encoded in the board revision.  Add a
helper to extract the number of cores, and use it.  This will be
helpful when we add the Raspi0/1 that have a single core.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20200208165645.15657-14-f4bug@amsat.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
[PMM: tweaked commit message as suggested by Igor]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2020-02-08 17:56:45 +01:00 • committed by Peter Maydell
parent a03bde3674
commit 759f0f87e3
1 changed files with 16 additions and 3 deletions
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19
hw/arm/raspi.c
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@ -101,6 +101,21 @@ static const char *board_soc_type(uint32_t board_rev)
return soc_types[proc_id]; return soc_types[proc_id];
} }
static int cores_count(uint32_t board_rev)
{
static const int soc_cores_count[] = {
0, BCM283X_NCPUS, BCM283X_NCPUS,
};
int proc_id = board_processor_id(board_rev);
if (proc_id >= ARRAY_SIZE(soc_cores_count) || !soc_cores_count[proc_id]) {
error_report("Unsupported processor id '%d' (board revision: 0x%x)",
proc_id, board_rev);
exit(1);
}
return soc_cores_count[proc_id];
}
static const char *board_type(uint32_t board_rev) static const char *board_type(uint32_t board_rev)
{ {
static const char *types[] = { static const char *types[] = {
@ -307,9 +322,7 @@ static void raspi_machine_class_init(ObjectClass *oc, void *data)
mc->no_parallel = 1; mc->no_parallel = 1;
mc->no_floppy = 1; mc->no_floppy = 1;
mc->no_cdrom = 1; mc->no_cdrom = 1;
mc->max_cpus = BCM283X_NCPUS; mc->default_cpus = mc->min_cpus = mc->max_cpus = cores_count(board_rev);
mc->min_cpus = BCM283X_NCPUS;
mc->default_cpus = BCM283X_NCPUS;
mc->default_ram_size = board_ram_size(board_rev); mc->default_ram_size = board_ram_size(board_rev);
if (board_version(board_rev) == 2) { if (board_version(board_rev) == 2) {
mc->ignore_memory_transaction_failures = true; mc->ignore_memory_transaction_failures = true;