Orange Pi5 kernel

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __SPARC_MMAN_H__
#define __SPARC_MMAN_H__
 
#include <uapi/asm/mman.h>
 
#ifndef __ASSEMBLY__
#define arch_mmap_check(addr,len,flags)	sparc_mmap_check(addr,len)
int sparc_mmap_check(unsigned long addr, unsigned long len);
 
#ifdef CONFIG_SPARC64
#include <asm/adi_64.h>
 
static inline void ipi_set_tstate_mcde(void *arg)
{
<------>struct mm_struct *mm = arg;
 
<------>/* Set TSTATE_MCDE for the task using address map that ADI has been
<------> * enabled on if the task is running. If not, it will be set
<------> * automatically at the next context switch
<------> */
<------>if (current->mm == mm) {
<------><------>struct pt_regs *regs;
 
<------><------>regs = task_pt_regs(current);
<------><------>regs->tstate |= TSTATE_MCDE;
<------>}
}
 
#define arch_calc_vm_prot_bits(prot, pkey) sparc_calc_vm_prot_bits(prot)
static inline unsigned long sparc_calc_vm_prot_bits(unsigned long prot)
{
<------>if (adi_capable() && (prot & PROT_ADI)) {
<------><------>struct pt_regs *regs;
 
<------><------>if (!current->mm->context.adi) {
<------><------><------>regs = task_pt_regs(current);
<------><------><------>regs->tstate |= TSTATE_MCDE;
<------><------><------>current->mm->context.adi = true;
<------><------><------>on_each_cpu_mask(mm_cpumask(current->mm),
<------><------><------><------><------> ipi_set_tstate_mcde, current->mm, 0);
<------><------>}
<------><------>return VM_SPARC_ADI;
<------>} else {
<------><------>return 0;
<------>}
}
 
#define arch_vm_get_page_prot(vm_flags) sparc_vm_get_page_prot(vm_flags)
static inline pgprot_t sparc_vm_get_page_prot(unsigned long vm_flags)
{
<------>return (vm_flags & VM_SPARC_ADI) ? __pgprot(_PAGE_MCD_4V) : __pgprot(0);
}
 
#define arch_validate_prot(prot, addr) sparc_validate_prot(prot, addr)
static inline int sparc_validate_prot(unsigned long prot, unsigned long addr)
{
<------>if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_ADI))
<------><------>return 0;
<------>return 1;
}
 
#define arch_validate_flags(vm_flags) arch_validate_flags(vm_flags)
/* arch_validate_flags() - Ensure combination of flags is valid for a
 *	VMA.
 */
static inline bool arch_validate_flags(unsigned long vm_flags)
{
<------>/* If ADI is being enabled on this VMA, check for ADI
<------> * capability on the platform and ensure VMA is suitable
<------> * for ADI
<------> */
<------>if (vm_flags & VM_SPARC_ADI) {
<------><------>if (!adi_capable())
<------><------><------>return false;
 
<------><------>/* ADI can not be enabled on PFN mapped pages */
<------><------>if (vm_flags & (VM_PFNMAP | VM_MIXEDMAP))
<------><------><------>return false;
 
<------><------>/* Mergeable pages can become unmergeable
<------><------> * if ADI is enabled on them even if they
<------><------> * have identical data on them. This can be
<------><------> * because ADI enabled pages with identical
<------><------> * data may still not have identical ADI
<------><------> * tags on them. Disallow ADI on mergeable
<------><------> * pages.
<------><------> */
<------><------>if (vm_flags & VM_MERGEABLE)
<------><------><------>return false;
<------>}
<------>return true;
}
#endif /* CONFIG_SPARC64 */
 
#endif /* __ASSEMBLY__ */
#endif /* __SPARC_MMAN_H__ */