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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lima_bcast.c (1305B)

      1// SPDX-License-Identifier: GPL-2.0 OR MIT
      2/* Copyright 2018-2019 Qiang Yu <yuq825@gmail.com> */
      3
      4#include <linux/io.h>
      5#include <linux/device.h>
      6
      7#include "lima_device.h"
      8#include "lima_bcast.h"
      9#include "lima_regs.h"
     10
     11#define bcast_write(reg, data) writel(data, ip->iomem + reg)
     12#define bcast_read(reg) readl(ip->iomem + reg)
     13
     14void lima_bcast_enable(struct lima_device *dev, int num_pp)
     15{
     16	struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_pp;
     17	struct lima_ip *ip = dev->ip + lima_ip_bcast;
     18	int i, mask = bcast_read(LIMA_BCAST_BROADCAST_MASK) & 0xffff0000;
     19
     20	for (i = 0; i < num_pp; i++) {
     21		struct lima_ip *pp = pipe->processor[i];
     22
     23		mask |= 1 << (pp->id - lima_ip_pp0);
     24	}
     25
     26	bcast_write(LIMA_BCAST_BROADCAST_MASK, mask);
     27}
     28
     29static int lima_bcast_hw_init(struct lima_ip *ip)
     30{
     31	bcast_write(LIMA_BCAST_BROADCAST_MASK, ip->data.mask << 16);
     32	bcast_write(LIMA_BCAST_INTERRUPT_MASK, ip->data.mask);
     33	return 0;
     34}
     35
     36int lima_bcast_resume(struct lima_ip *ip)
     37{
     38	return lima_bcast_hw_init(ip);
     39}
     40
     41void lima_bcast_suspend(struct lima_ip *ip)
     42{
     43
     44}
     45
     46int lima_bcast_init(struct lima_ip *ip)
     47{
     48	int i;
     49
     50	for (i = lima_ip_pp0; i <= lima_ip_pp7; i++) {
     51		if (ip->dev->ip[i].present)
     52			ip->data.mask |= 1 << (i - lima_ip_pp0);
     53	}
     54
     55	return lima_bcast_hw_init(ip);
     56}
     57
     58void lima_bcast_fini(struct lima_ip *ip)
     59{
     60
     61}
     62