diff options
| author | Anup Patel <anup.patel@wdc.com> | 2020-03-15 11:39:25 +0530 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2020-03-19 09:30:01 +0530 |
| commit | c51f02cf143b081c2a81717393a0e6cef2ce2521 (patch) | |
| tree | eeff8cd451d20bfa543df626e1713a59803e6fb4 /platform | |
| parent | 75eec9dd3f04febd7df8e5ee3fb90c236e50ded3 (diff) | |
include: sbi_platform: Introduce HART index to HART id table
A platform can have discontinuous and/or sparse HART ids so we
cannot always assume a set of HARTs with continuous HART ids.
This patch adds support for discontinuous and sparse HART ids by
introducing HART index to HART id table. This table has platform
hart_count entries and it maps HART index to HART id.
The HART index to HART id table has only two restrictions:
1. HART index < sbi_platform hart_count
2. HART id < SBI_HARTMASK_MAX_BITS
Example1:
Let's say we have a platform with 2 HART ids 11 and 22, for such a
a platform:
hart_count = 2
hart_index2id[0] = 11
hart_index2id[1] = 22
Example2:
Let's say we have a platform with 5 HARTs ids 0, 1, 2, 3, and 4
but out of these HART with id 0 is not usable so for such a platform:
hart_count = 5
hart_index2id[0] = -1U
hart_index2id[1] = 1
hart_index2id[2] = 2
hart_index2id[3] = 3
hart_index2id[4] = 4
OR
hart_count = 4
hart_index2id[0] = 1
hart_index2id[1] = 2
hart_index2id[2] = 3
hart_index2id[3] = 4
With HART index to HART id table in place, the hart_disabled()
callback is now redundant so we remove it as well.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Diffstat (limited to 'platform')
| -rw-r--r-- | platform/sifive/fu540/platform.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/platform/sifive/fu540/platform.c b/platform/sifive/fu540/platform.c index db647ca..6714cd5 100644 --- a/platform/sifive/fu540/platform.c +++ b/platform/sifive/fu540/platform.c @@ -165,10 +165,12 @@ static int fu540_timer_init(bool cold_boot) return clint_warm_timer_init(); } -static bool fu540_hart_disabled(u32 hartid) -{ - return (FU540_HARITD_DISABLED & (1UL << hartid)) ? TRUE : FALSE; -} +static u32 fu540_hart_index2id[FU540_HART_COUNT - 1] = { + [0] = 1, + [1] = 2, + [2] = 3, + [3] = 4, +}; static int fu540_system_down(u32 type) { @@ -192,7 +194,6 @@ const struct sbi_platform_operations platform_ops = { .timer_event_stop = clint_timer_event_stop, .timer_event_start = clint_timer_event_start, .timer_init = fu540_timer_init, - .hart_disabled = fu540_hart_disabled, .system_reboot = fu540_system_down, .system_shutdown = fu540_system_down }; @@ -202,7 +203,8 @@ const struct sbi_platform platform = { .platform_version = SBI_PLATFORM_VERSION(0x0, 0x01), .name = "SiFive Freedom U540", .features = SBI_PLATFORM_DEFAULT_FEATURES, - .hart_count = FU540_HART_COUNT, + .hart_count = (FU540_HART_COUNT - 1), + .hart_index2id = fu540_hart_index2id, .hart_stack_size = SBI_PLATFORM_DEFAULT_HART_STACK_SIZE, .platform_ops_addr = (unsigned long)&platform_ops }; |