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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2020 Google LLC
* Author: Quentin Perret <qperret@google.com>
*/
#include <asm/kvm_pgtable.h>
#include <nvhe/early_alloc.h>
#include <nvhe/memory.h>
struct kvm_pgtable_mm_ops hyp_early_alloc_mm_ops;
s64 __ro_after_init hyp_physvirt_offset;
static unsigned long base;
static unsigned long end;
static unsigned long cur;
unsigned long hyp_early_alloc_nr_used_pages(void)
{
return (cur - base) >> PAGE_SHIFT;
}
void *hyp_early_alloc_contig(unsigned int nr_pages)
{
unsigned long size = (nr_pages << PAGE_SHIFT);
void *ret = (void *)cur;
if (!nr_pages)
return NULL;
if (end - cur < size)
return NULL;
cur += size;
memset(ret, 0, size);
return ret;
}
void *hyp_early_alloc_page(void *arg)
{
return hyp_early_alloc_contig(1);
}
static void hyp_early_alloc_get_page(void *addr) { }
static void hyp_early_alloc_put_page(void *addr) { }
void hyp_early_alloc_init(void *virt, unsigned long size)
{
base = cur = (unsigned long)virt;
end = base + size;
hyp_early_alloc_mm_ops.zalloc_page = hyp_early_alloc_page;
hyp_early_alloc_mm_ops.phys_to_virt = hyp_phys_to_virt;
hyp_early_alloc_mm_ops.virt_to_phys = hyp_virt_to_phys;
hyp_early_alloc_mm_ops.get_page = hyp_early_alloc_get_page;
hyp_early_alloc_mm_ops.put_page = hyp_early_alloc_put_page;
}
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