From 759f0f87e34fe63a475d926ea6db88d11d2cd018 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Date: Sat, 8 Feb 2020 17:56:45 +0100 Subject: [PATCH] hw/arm/raspi: Extract the cores count from the board revision MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Message-id: 20200208165645.15657-14-f4bug@amsat.org Reviewed-by: Peter Maydell [PMM: tweaked commit message as suggested by Igor] Signed-off-by: Peter Maydell --- hw/arm/raspi.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) diff --git a/hw/arm/raspi.c b/hw/arm/raspi.c index bee6ca0a08..90ad9b8115 100644 --- a/hw/arm/raspi.c +++ b/hw/arm/raspi.c @@ -101,6 +101,21 @@ static const char *board_soc_type(uint32_t board_rev) 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 *types[] = { @@ -307,9 +322,7 @@ static void raspi_machine_class_init(ObjectClass *oc, void *data) mc->no_parallel = 1; mc->no_floppy = 1; mc->no_cdrom = 1; - mc->max_cpus = BCM283X_NCPUS; - mc->min_cpus = BCM283X_NCPUS; - mc->default_cpus = BCM283X_NCPUS; + mc->default_cpus = mc->min_cpus = mc->max_cpus = cores_count(board_rev); mc->default_ram_size = board_ram_size(board_rev); if (board_version(board_rev) == 2) { mc->ignore_memory_transaction_failures = true;