diff options
Diffstat (limited to 'arch/hexagon/include/uapi/asm/registers.h')
-rw-r--r-- | arch/hexagon/include/uapi/asm/registers.h | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/arch/hexagon/include/uapi/asm/registers.h b/arch/hexagon/include/uapi/asm/registers.h new file mode 100644 index 0000000000..d51270f3b3 --- /dev/null +++ b/arch/hexagon/include/uapi/asm/registers.h @@ -0,0 +1,229 @@ +/* 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 |