cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ip30-console.c (414B)

      1// SPDX-License-Identifier: GPL-2.0
      2
      3#include <linux/io.h>
      4
      5#include <asm/sn/ioc3.h>
      6
      7static inline struct ioc3_uartregs *console_uart(void)
      8{
      9	struct ioc3 *ioc3;
     10
     11	ioc3 = (struct ioc3 *)((void *)(0x900000001f600000));
     12	return &ioc3->sregs.uarta;
     13}
     14
     15void prom_putchar(char c)
     16{
     17	struct ioc3_uartregs *uart = console_uart();
     18
     19	while ((readb(&uart->iu_lsr) & 0x20) == 0)
     20		cpu_relax();
     21
     22	writeb(c, &uart->iu_thr);
     23}