diff options
| author | Simon Glass | 2020-04-08 16:57:20 -0600 |
|---|---|---|
| committer | Bin Meng | 2020-04-16 14:36:28 +0800 |
| commit | 600f584d8191799acc19464c4a07f3056083057a (patch) | |
| tree | 87bbba5d9ad49ad045b524d5ce9a1a8d60abd508 | |
| parent | 98036fbdaf0ac1d6dc3ab3cb6db24c020bb65d6f (diff) | |
cpu: Support querying the address width
Different CPUs may support different address widths, meaning the amount of
memory they can address. Add a property for this to the cpu_info struct.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
| -rw-r--r-- | drivers/cpu/cpu_sandbox.c | 1 | ||||
| -rw-r--r-- | include/cpu.h | 2 | ||||
| -rw-r--r-- | test/dm/cpu.c | 1 |
3 files changed, 4 insertions, 0 deletions
diff --git a/drivers/cpu/cpu_sandbox.c b/drivers/cpu/cpu_sandbox.c index ff87e8adca3..05b384f6a45 100644 --- a/drivers/cpu/cpu_sandbox.c +++ b/drivers/cpu/cpu_sandbox.c @@ -19,6 +19,7 @@ int cpu_sandbox_get_info(struct udevice *dev, struct cpu_info *info) { info->cpu_freq = 42 * 42 * 42 * 42 * 42; info->features = 0x42424242; + info->address_width = IS_ENABLED(CONFIG_PHYS_64BIT) ? 64 : 32; return 0; } diff --git a/include/cpu.h b/include/cpu.h index 28dd48feb8f..6b1b6b37b3b 100644 --- a/include/cpu.h +++ b/include/cpu.h @@ -44,10 +44,12 @@ enum { * * @cpu_freq: Current CPU frequency in Hz * @features: Flags for supported CPU features + * @address_width: Width of the CPU address space in bits (e.g. 32) */ struct cpu_info { ulong cpu_freq; ulong features; + uint address_width; }; struct cpu_ops { diff --git a/test/dm/cpu.c b/test/dm/cpu.c index f5f1caef716..e6dc576ea3c 100644 --- a/test/dm/cpu.c +++ b/test/dm/cpu.c @@ -33,6 +33,7 @@ static int dm_test_cpu(struct unit_test_state *uts) ut_assertok(cpu_get_info(dev, &info)); ut_asserteq(info.cpu_freq, 42 * 42 * 42 * 42 * 42); ut_asserteq(info.features, 0x42424242); + ut_asserteq(info.address_width, 32); ut_asserteq(cpu_get_count(dev), 42); |