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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* Register definitions for the Hexagon architecture
*/
#ifndef _ASM_REGISTERS_H
#define _ASM_REGISTERS_H
#ifndef __ASSEMBLY__
/* See kernel/entry.S for further documentation. */
/*
* Entry code copies the event record out of guest registers into
* this structure (which is on the stack).
*/
struct hvm_event_record {
unsigned long vmel; /* Event Linkage (return address) */
unsigned long vmest; /* Event context - pre-event SSR values */
unsigned long vmpsp; /* Previous stack pointer */
unsigned long vmbadva; /* Bad virtual address for addressing events */
};
struct pt_regs {
long restart_r0; /* R0 checkpoint for syscall restart */
long syscall_nr; /* Only used in system calls */
union {
struct {
unsigned long usr;
unsigned long preds;
};
long long int predsusr;
};
union {
struct {
unsigned long m0;
unsigned long m1;
};
long long int m1m0;
};
union {
struct {
unsigned long sa1;
unsigned long lc1;
};
long long int lc1sa1;
};
union {
struct {
unsigned long sa0;
unsigned long lc0;
};
long long int lc0sa0;
};
union {
struct {
unsigned long ugp;
unsigned long gp;
};
long long int gpugp;
};
union {
struct {
unsigned long cs0;
unsigned long cs1;
};
long long int cs1cs0;
};
/*
* Be extremely careful with rearranging these, if at all. Some code
* assumes the 32 registers exist exactly like this in memory;
* e.g. kernel/ptrace.c
* e.g. kernel/signal.c (restore_sigcontext)
*/
union {
struct {
unsigned long r00;
unsigned long r01;
};
long long int r0100;
};
union {
struct {
unsigned long r02;
unsigned long r03;
};
long long int r0302;
};
union {
struct {
unsigned long r04;
unsigned long r05;
};
long long int r0504;
};
union {
struct {
unsigned long r06;
unsigned long r07;
};
long long int r0706;
};
union {
struct {
unsigned long r08;
unsigned long r09;
};
long long int r0908;
};
union {
struct {
unsigned long r10;
unsigned long r11;
};
long long int r1110;
};
union {
struct {
unsigned long r12;
unsigned long r13;
};
long long int r1312;
};
union {
struct {
unsigned long r14;
unsigned long r15;
};
long long int r1514;
};
union {
struct {
unsigned long r16;
unsigned long r17;
};
long long int r1716;
};
union {
struct {
unsigned long r18;
unsigned long r19;
};
long long int r1918;
};
union {
struct {
unsigned long r20;
unsigned long r21;
};
long long int r2120;
};
union {
struct {
unsigned long r22;
unsigned long r23;
};
long long int r2322;
};
union {
struct {
unsigned long r24;
unsigned long r25;
};
long long int r2524;
};
union {
struct {
unsigned long r26;
unsigned long r27;
};
long long int r2726;
};
union {
struct {
unsigned long r28;
unsigned long r29;
};
long long int r2928;
};
union {
struct {
unsigned long r30;
unsigned long r31;
};
long long int r3130;
};
/* VM dispatch pushes event record onto stack - we can build on it */
struct hvm_event_record hvmer;
};
/* Defines to conveniently access the values */
/*
* As of the VM spec 0.5, these registers are now set/retrieved via a
* VM call. On the in-bound side, we just fetch the values
* at the entry points and stuff them into the old record in pt_regs.
* However, on the outbound side, probably at VM rte, we set the
* registers back.
*/
#define pt_elr(regs) ((regs)->hvmer.vmel)
#define pt_set_elr(regs, val) ((regs)->hvmer.vmel = (val))
#define pt_cause(regs) ((regs)->hvmer.vmest & (HVM_VMEST_CAUSE_MSK))
#define user_mode(regs) \
(((regs)->hvmer.vmest & (HVM_VMEST_UM_MSK << HVM_VMEST_UM_SFT)) != 0)
#define ints_enabled(regs) \
(((regs)->hvmer.vmest & (HVM_VMEST_IE_MSK << HVM_VMEST_IE_SFT)) != 0)
#define pt_psp(regs) ((regs)->hvmer.vmpsp)
#define pt_badva(regs) ((regs)->hvmer.vmbadva)
#define pt_set_singlestep(regs) ((regs)->hvmer.vmest |= (1<<HVM_VMEST_SS_SFT))
#define pt_clr_singlestep(regs) ((regs)->hvmer.vmest &= ~(1<<HVM_VMEST_SS_SFT))
#define pt_set_rte_sp(regs, sp) do {\
pt_psp(regs) = (regs)->r29 = (sp);\
} while (0)
#define pt_set_kmode(regs) \
(regs)->hvmer.vmest = (HVM_VMEST_IE_MSK << HVM_VMEST_IE_SFT)
#define pt_set_usermode(regs) \
(regs)->hvmer.vmest = (HVM_VMEST_UM_MSK << HVM_VMEST_UM_SFT) \
| (HVM_VMEST_IE_MSK << HVM_VMEST_IE_SFT)
#endif /* ifndef __ASSEMBLY */
#endif
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