cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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head_32.h (2617B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef __SPARC_HEAD_H
      3#define __SPARC_HEAD_H
      4
      5#define KERNBASE        0xf0000000  /* First address the kernel will eventually be */
      6
      7#define WRITE_PAUSE      nop; nop; nop; /* Have to do this after %wim/%psr chg */
      8
      9/* Here are some trap goodies */
     10
     11/* Generic trap entry. */
     12#define TRAP_ENTRY(type, label) \
     13	rd %psr, %l0; b label; rd %wim, %l3; nop;
     14
     15/* Data/text faults */
     16#define SRMMU_TFAULT rd %psr, %l0; rd %wim, %l3; b srmmu_fault; mov 1, %l7;
     17#define SRMMU_DFAULT rd %psr, %l0; rd %wim, %l3; b srmmu_fault; mov 0, %l7;
     18
     19/* This is for traps we should NEVER get. */
     20#define BAD_TRAP(num) \
     21        rd %psr, %l0; mov num, %l7; b bad_trap_handler; rd %wim, %l3;
     22
     23/* This is for traps when we want just skip the instruction which caused it */
     24#define SKIP_TRAP(type, name) \
     25	jmpl %l2, %g0; rett %l2 + 4; nop; nop;
     26
     27/* Notice that for the system calls we pull a trick.  We load up a
     28 * different pointer to the system call vector table in %l7, but call
     29 * the same generic system call low-level entry point.  The trap table
     30 * entry sequences are also HyperSparc pipeline friendly ;-)
     31 */
     32
     33/* Software trap for Linux system calls. */
     34#define LINUX_SYSCALL_TRAP \
     35        sethi %hi(sys_call_table), %l7; \
     36        or %l7, %lo(sys_call_table), %l7; \
     37        b linux_sparc_syscall; \
     38        rd %psr, %l0;
     39
     40#define BREAKPOINT_TRAP \
     41	b breakpoint_trap; \
     42	rd %psr,%l0; \
     43	nop; \
     44	nop;
     45
     46#ifdef CONFIG_KGDB
     47#define KGDB_TRAP(num)                  \
     48	mov num, %l7;                   \
     49	b kgdb_trap_low;                \
     50	rd %psr,%l0;                    \
     51	nop;
     52#else
     53#define KGDB_TRAP(num) \
     54	BAD_TRAP(num)
     55#endif
     56
     57/* The Get Condition Codes software trap for userland. */
     58#define GETCC_TRAP \
     59        b getcc_trap_handler; rd %psr, %l0; nop; nop;
     60
     61/* The Set Condition Codes software trap for userland. */
     62#define SETCC_TRAP \
     63        b setcc_trap_handler; rd %psr, %l0; nop; nop;
     64
     65/* The Get PSR software trap for userland. */
     66#define GETPSR_TRAP \
     67	rd %psr, %i0; jmp %l2; rett %l2 + 4; nop;
     68
     69/* This is for hard interrupts from level 1-14, 15 is non-maskable (nmi) and
     70 * gets handled with another macro.
     71 */
     72#define TRAP_ENTRY_INTERRUPT(int_level) \
     73        mov int_level, %l7; rd %psr, %l0; b real_irq_entry; rd %wim, %l3;
     74
     75/* Window overflows/underflows are special and we need to try to be as
     76 * efficient as possible here....
     77 */
     78#define WINDOW_SPILL \
     79        rd %psr, %l0; rd %wim, %l3; b spill_window_entry; andcc %l0, PSR_PS, %g0;
     80
     81#define WINDOW_FILL \
     82        rd %psr, %l0; rd %wim, %l3; b fill_window_entry; andcc %l0, PSR_PS, %g0;
     83
     84#endif /* __SPARC_HEAD_H */