diff options
| author | Michael Brown | 2025-11-04 17:43:44 +0100 |
|---|---|---|
| committer | Michael Brown | 2025-11-04 22:14:41 +0100 |
| commit | a786c8d2313ebe973ace0cbbe4f8f3825251062a (patch) | |
| tree | adf43a1c3a8b9757004dbf372375e6fc4342ec48 /src/include | |
| parent | [ioapi] Provide combined MMIO and port I/O accessors (diff) | |
| download | ipxe-a786c8d2313ebe973ace0cbbe4f8f3825251062a.tar.gz ipxe-a786c8d2313ebe973ace0cbbe4f8f3825251062a.tar.xz ipxe-a786c8d2313ebe973ace0cbbe4f8f3825251062a.zip | |
[uart] Support 16550 UARTs accessed via either MMIO or port I/O
Use the combined accessors ioread8() and iowrite8() to read and write
16550 UART registers, to allow the decision between using MMIO and
port I/O to be made at runtime.
Minimise the increase in code size for x86 by ignoring the register
shift, since this is essentially used only for non-x86 SoCs.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/bits/ns16550.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/include/bits/ns16550.h b/src/include/bits/ns16550.h index e40b2a21b..45e3e978f 100644 --- a/src/include/bits/ns16550.h +++ b/src/include/bits/ns16550.h @@ -23,7 +23,7 @@ static inline __attribute__ (( always_inline )) void ns16550_write ( struct ns16550_uart *ns16550, unsigned int address, uint8_t data ) { - writeb ( data, ( ns16550->base + ( address << ns16550->shift ) ) ); + iowrite8 ( data, ( ns16550->base + ( address << ns16550->shift ) ) ); } /** @@ -36,7 +36,7 @@ ns16550_write ( struct ns16550_uart *ns16550, unsigned int address, static inline __attribute__ (( always_inline )) uint8_t ns16550_read ( struct ns16550_uart *ns16550, unsigned int address ) { - return readb ( ns16550->base + ( address << ns16550->shift ) ); + return ioread8 ( ns16550->base + ( address << ns16550->shift ) ); } #endif /* _BITS_NS16550_H */ |