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lib: utils/serial: Ensure proper allocation of PMP entries for uart8250

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The added memory region should start from the base address.
Otherwise, the range will be shifted by reg_offset and not
able to merge consecutive NAPOT regions in the root domain,
resulting in wasted PMP entries.

Fixes: e8bc1621 ("lib: utils/serial: Add shared regions for
serial drivers")

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Yu Chien Peter Lin 2023-09-25 20:24:26 +08:00 • committed by Anup Patel
parent e21901d317
commit a12542316c
1 changed files with 1 additions and 2 deletions

3
lib/utils/serial/uart8250.c
View file

@ -135,8 +135,7 @@ int uart8250_init(unsigned long base, u32 in_freq, u32 baudrate, u32 reg_shift,
sbi_console_set_device(&uart8250_console);
return sbi_domain_root_add_memrange(base + reg_offset, PAGE_SIZE,
PAGE_SIZE,
return sbi_domain_root_add_memrange(base, PAGE_SIZE, PAGE_SIZE,
(SBI_DOMAIN_MEMREGION_MMIO |
SBI_DOMAIN_MEMREGION_SHARED_SURW_MRW));
}