770a8eef3e
Introduce a minimal Xen guest board running as a virtual machine under Xen Project's hypervisor [1], [2]. Part of the code is ported from Xen mini-os and also uses work initially done by different authors from NXP: please see relevant files for their copyrights. [1] https://xenbits.xen.org [2] https://wiki.xenproject.org/ Signed-off-by: Andrii Anisov <andrii_anisov@epam.com> Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Signed-off-by: Anastasiia Lukianenko <anastasiia_lukianenko@epam.com>
153 lines
2.9 KiB
C
153 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* (C) 2013
|
|
* David Feng <fenghua@phytium.com.cn>
|
|
* Sharma Bhupesh <bhupesh.sharma@freescale.com>
|
|
*
|
|
* (C) 2020 EPAM Systems Inc
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <cpu_func.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <malloc.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/armv8/mmu.h>
|
|
#include <asm/xen.h>
|
|
#include <asm/xen/hypercall.h>
|
|
|
|
#include <linux/compiler.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
int board_init(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Use fdt provided by Xen: according to
|
|
* https://www.kernel.org/doc/Documentation/arm64/booting.txt
|
|
* x0 is the physical address of the device tree blob (dtb) in system RAM.
|
|
* This is stored in rom_pointer during low level init.
|
|
*/
|
|
void *board_fdt_blob_setup(void)
|
|
{
|
|
if (fdt_magic(rom_pointer[0]) != FDT_MAGIC)
|
|
return NULL;
|
|
return (void *)rom_pointer[0];
|
|
}
|
|
|
|
#define MAX_MEM_MAP_REGIONS 5
|
|
static struct mm_region xen_mem_map[MAX_MEM_MAP_REGIONS];
|
|
struct mm_region *mem_map = xen_mem_map;
|
|
|
|
static int get_next_memory_node(const void *blob, int mem)
|
|
{
|
|
do {
|
|
mem = fdt_node_offset_by_prop_value(blob, mem,
|
|
"device_type", "memory", 7);
|
|
} while (!fdtdec_get_is_enabled(blob, mem));
|
|
|
|
return mem;
|
|
}
|
|
|
|
static int setup_mem_map(void)
|
|
{
|
|
int i, ret, mem, reg = 0;
|
|
struct fdt_resource res;
|
|
const void *blob = gd->fdt_blob;
|
|
|
|
mem = get_next_memory_node(blob, -1);
|
|
if (mem < 0) {
|
|
printf("%s: Missing /memory node\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (i = 0; i < MAX_MEM_MAP_REGIONS; i++) {
|
|
ret = fdt_get_resource(blob, mem, "reg", reg++, &res);
|
|
if (ret == -FDT_ERR_NOTFOUND) {
|
|
reg = 0;
|
|
mem = get_next_memory_node(blob, mem);
|
|
if (mem == -FDT_ERR_NOTFOUND)
|
|
break;
|
|
|
|
ret = fdt_get_resource(blob, mem, "reg", reg++, &res);
|
|
if (ret == -FDT_ERR_NOTFOUND)
|
|
break;
|
|
}
|
|
if (ret != 0) {
|
|
printf("No reg property for memory node\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
xen_mem_map[i].virt = (phys_addr_t)res.start;
|
|
xen_mem_map[i].phys = (phys_addr_t)res.start;
|
|
xen_mem_map[i].size = (phys_size_t)(res.end - res.start + 1);
|
|
xen_mem_map[i].attrs = (PTE_BLOCK_MEMTYPE(MT_NORMAL) |
|
|
PTE_BLOCK_INNER_SHARE);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void enable_caches(void)
|
|
{
|
|
/* Re-setup the memory map as BSS gets cleared after relocation. */
|
|
setup_mem_map();
|
|
icache_enable();
|
|
dcache_enable();
|
|
}
|
|
|
|
/* Read memory settings from the Xen provided device tree. */
|
|
int dram_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = fdtdec_setup_mem_size_base();
|
|
if (ret < 0)
|
|
return ret;
|
|
/* Setup memory map, so MMU page table size can be estimated. */
|
|
return setup_mem_map();
|
|
}
|
|
|
|
int dram_init_banksize(void)
|
|
{
|
|
return fdtdec_setup_memory_banksize();
|
|
}
|
|
|
|
/*
|
|
* Board specific reset that is system reset.
|
|
*/
|
|
void reset_cpu(ulong addr)
|
|
{
|
|
}
|
|
|
|
int ft_system_setup(void *blob, struct bd_info *bd)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int ft_board_setup(void *blob, struct bd_info *bd)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int board_early_init_f(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int print_cpuinfo(void)
|
|
{
|
|
printf("Xen virtual CPU\n");
|
|
return 0;
|
|
}
|
|
|
|
__weak struct serial_device *default_serial_console(void)
|
|
{
|
|
return NULL;
|
|
}
|
|
|