metag: Various other headers
Add the remaining metag header files: - byteorder.h, swab.h (byte order and swapping) - barrier.h, cpu.h. hwthread.h, processor.h (hardware thread related) - bug.h, elf.h, gpio.h, linkage.h, resource.h (other) Signed-off-by: James Hogan <james.hogan@imgtec.com>
This commit is contained in:
James Hogan
Родитель
e8de3486a4
Коммит
1e57372eac
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@ -0,0 +1,85 @@
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#ifndef _ASM_METAG_BARRIER_H
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#define _ASM_METAG_BARRIER_H
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#include <asm/metag_mem.h>
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#define nop() asm volatile ("NOP")
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#define mb() wmb()
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#define rmb() barrier()
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#ifdef CONFIG_METAG_META21
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/* HTP and above have a system event to fence writes */
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static inline void wr_fence(void)
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{
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volatile int *flushptr = (volatile int *) LINSYSEVENT_WR_FENCE;
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barrier();
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*flushptr = 0;
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}
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#else /* CONFIG_METAG_META21 */
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/*
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* ATP doesn't have system event to fence writes, so it is necessary to flush
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* the processor write queues as well as possibly the write combiner (depending
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* on the page being written).
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* To ensure the write queues are flushed we do 4 writes to a system event
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* register (in this case write combiner flush) which will also flush the write
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* combiner.
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*/
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static inline void wr_fence(void)
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{
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volatile int *flushptr = (volatile int *) LINSYSEVENT_WR_COMBINE_FLUSH;
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barrier();
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*flushptr = 0;
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*flushptr = 0;
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*flushptr = 0;
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*flushptr = 0;
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}
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#endif /* !CONFIG_METAG_META21 */
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static inline void wmb(void)
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{
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/* flush writes through the write combiner */
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wr_fence();
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}
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#define read_barrier_depends() do { } while (0)
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#ifndef CONFIG_SMP
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#define fence() do { } while (0)
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#define smp_mb() barrier()
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#define smp_rmb() barrier()
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#define smp_wmb() barrier()
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#else
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#ifdef CONFIG_METAG_SMP_WRITE_REORDERING
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/*
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* Write to the atomic memory unlock system event register (command 0). This is
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* needed before a write to shared memory in a critical section, to prevent
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* external reordering of writes before the fence on other threads with writes
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* after the fence on this thread (and to prevent the ensuing cache-memory
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* incoherence). It is therefore ineffective if used after and on the same
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* thread as a write.
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*/
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static inline void fence(void)
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{
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volatile int *flushptr = (volatile int *) LINSYSEVENT_WR_ATOMIC_UNLOCK;
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barrier();
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*flushptr = 0;
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}
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#define smp_mb() fence()
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#define smp_rmb() fence()
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#define smp_wmb() barrier()
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#else
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#define fence() do { } while (0)
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#define smp_mb() barrier()
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#define smp_rmb() barrier()
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#define smp_wmb() barrier()
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#endif
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#endif
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#define smp_read_barrier_depends() do { } while (0)
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#define set_mb(var, value) do { var = value; smp_mb(); } while (0)
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#endif /* _ASM_METAG_BARRIER_H */
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@ -0,0 +1,12 @@
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#ifndef _ASM_METAG_BUG_H
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#define _ASM_METAG_BUG_H
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#include <asm-generic/bug.h>
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struct pt_regs;
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extern const char *trap_name(int trapno);
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extern void die(const char *str, struct pt_regs *regs, long err,
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unsigned long addr) __attribute__ ((noreturn));
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#endif
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@ -0,0 +1,14 @@
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#ifndef _ASM_METAG_CPU_H
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#define _ASM_METAG_CPU_H
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#include <linux/percpu.h>
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struct cpuinfo_metag {
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struct cpu cpu;
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#ifdef CONFIG_SMP
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unsigned long loops_per_jiffy;
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#endif
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};
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DECLARE_PER_CPU(struct cpuinfo_metag, cpu_data);
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#endif /* _ASM_METAG_CPU_H */
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@ -0,0 +1,128 @@
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#ifndef __ASM_METAG_ELF_H
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#define __ASM_METAG_ELF_H
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#define EM_METAG 174
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/* Meta relocations */
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#define R_METAG_HIADDR16 0
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#define R_METAG_LOADDR16 1
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#define R_METAG_ADDR32 2
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#define R_METAG_NONE 3
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#define R_METAG_RELBRANCH 4
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#define R_METAG_GETSETOFF 5
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/* Backward compatability */
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#define R_METAG_REG32OP1 6
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#define R_METAG_REG32OP2 7
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#define R_METAG_REG32OP3 8
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#define R_METAG_REG16OP1 9
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#define R_METAG_REG16OP2 10
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#define R_METAG_REG16OP3 11
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#define R_METAG_REG32OP4 12
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#define R_METAG_HIOG 13
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#define R_METAG_LOOG 14
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/* GNU */
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#define R_METAG_GNU_VTINHERIT 30
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#define R_METAG_GNU_VTENTRY 31
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/* PIC relocations */
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#define R_METAG_HI16_GOTOFF 32
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#define R_METAG_LO16_GOTOFF 33
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#define R_METAG_GETSET_GOTOFF 34
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#define R_METAG_GETSET_GOT 35
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#define R_METAG_HI16_GOTPC 36
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#define R_METAG_LO16_GOTPC 37
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#define R_METAG_HI16_PLT 38
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#define R_METAG_LO16_PLT 39
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#define R_METAG_RELBRANCH_PLT 40
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#define R_METAG_GOTOFF 41
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#define R_METAG_PLT 42
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#define R_METAG_COPY 43
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#define R_METAG_JMP_SLOT 44
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#define R_METAG_RELATIVE 45
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#define R_METAG_GLOB_DAT 46
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/*
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* ELF register definitions.
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*/
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#include <asm/page.h>
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#include <asm/processor.h>
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#include <asm/ptrace.h>
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#include <asm/user.h>
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typedef unsigned long elf_greg_t;
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#define ELF_NGREG (sizeof(struct user_gp_regs) / sizeof(elf_greg_t))
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typedef elf_greg_t elf_gregset_t[ELF_NGREG];
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typedef unsigned long elf_fpregset_t;
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/*
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* This is used to ensure we don't load something for the wrong architecture.
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*/
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#define elf_check_arch(x) ((x)->e_machine == EM_METAG)
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/*
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* These are used to set parameters in the core dumps.
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*/
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#define ELF_CLASS ELFCLASS32
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#define ELF_DATA ELFDATA2LSB
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#define ELF_ARCH EM_METAG
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#define ELF_PLAT_INIT(_r, load_addr) \
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do { _r->ctx.AX[0].U0 = 0; } while (0)
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#define USE_ELF_CORE_DUMP
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#define CORE_DUMP_USE_REGSET
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#define ELF_EXEC_PAGESIZE PAGE_SIZE
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/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
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use of this is to invoke "./ld.so someprog" to test out a new version of
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the loader. We need to make sure that it is out of the way of the program
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that it will "exec", and that there is sufficient room for the brk. */
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#define ELF_ET_DYN_BASE 0x08000000UL
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#define ELF_CORE_COPY_REGS(_dest, _regs) \
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memcpy((char *)&_dest, (char *)_regs, sizeof(struct pt_regs));
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/* This yields a mask that user programs can use to figure out what
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instruction set this cpu supports. */
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#define ELF_HWCAP (0)
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/* This yields a string that ld.so will use to load implementation
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specific libraries for optimization. This is more specific in
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intent than poking at uname or /proc/cpuinfo. */
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#define ELF_PLATFORM (NULL)
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#define SET_PERSONALITY(ex) \
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set_personality(PER_LINUX | (current->personality & (~PER_MASK)))
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#define STACK_RND_MASK (0)
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#ifdef CONFIG_METAG_USER_TCM
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struct elf32_phdr;
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struct file;
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unsigned long __metag_elf_map(struct file *filep, unsigned long addr,
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struct elf32_phdr *eppnt, int prot, int type,
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unsigned long total_size);
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static inline unsigned long metag_elf_map(struct file *filep,
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unsigned long addr,
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struct elf32_phdr *eppnt, int prot,
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int type, unsigned long total_size)
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{
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return __metag_elf_map(filep, addr, eppnt, prot, type, total_size);
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}
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#define elf_map metag_elf_map
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#endif
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#endif
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@ -0,0 +1,4 @@
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#ifndef __LINUX_GPIO_H
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#warning Include linux/gpio.h instead of asm/gpio.h
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#include <linux/gpio.h>
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#endif
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@ -0,0 +1,40 @@
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/*
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* Copyright (C) 2008 Imagination Technologies
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*/
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#ifndef __METAG_HWTHREAD_H
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#define __METAG_HWTHREAD_H
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#include <linux/bug.h>
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#include <linux/io.h>
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#include <asm/metag_mem.h>
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#define BAD_HWTHREAD_ID (0xFFU)
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#define BAD_CPU_ID (0xFFU)
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extern u8 cpu_2_hwthread_id[];
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extern u8 hwthread_id_2_cpu[];
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/*
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* Each hardware thread's Control Unit registers are memory-mapped
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* and can therefore be accessed by any other hardware thread.
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*
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* This helper function returns the memory address where "thread"'s
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* register "regnum" is mapped.
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*/
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static inline
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void __iomem *__CU_addr(unsigned int thread, unsigned int regnum)
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{
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unsigned int base, thread_offset, thread_regnum;
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WARN_ON(thread == BAD_HWTHREAD_ID);
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base = T0UCTREG0; /* Control unit base */
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thread_offset = TnUCTRX_STRIDE * thread;
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thread_regnum = TXUCTREGn_STRIDE * regnum;
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return (void __iomem *)(base + thread_offset + thread_regnum);
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}
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#endif /* __METAG_HWTHREAD_H */
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@ -0,0 +1,7 @@
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#ifndef __ASM_LINKAGE_H
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#define __ASM_LINKAGE_H
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#define __ALIGN .p2align 2
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#define __ALIGN_STR ".p2align 2"
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#endif
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@ -0,0 +1,202 @@
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/*
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* Copyright (C) 2005,2006,2007,2008 Imagination Technologies
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*/
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#ifndef __ASM_METAG_PROCESSOR_H
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#define __ASM_METAG_PROCESSOR_H
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#include <linux/atomic.h>
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#include <asm/page.h>
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#include <asm/ptrace.h>
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#include <asm/metag_regs.h>
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/*
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* Default implementation of macro that returns current
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* instruction pointer ("program counter").
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*/
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#define current_text_addr() ({ __label__ _l; _l: &&_l; })
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/* The task stops where the kernel starts */
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#define TASK_SIZE PAGE_OFFSET
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/* Add an extra page of padding at the top of the stack for the guard page. */
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#define STACK_TOP (TASK_SIZE - PAGE_SIZE)
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#define STACK_TOP_MAX STACK_TOP
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/* This decides where the kernel will search for a free chunk of vm
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* space during mmap's.
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*/
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#define TASK_UNMAPPED_BASE META_MEMORY_BASE
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typedef struct {
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unsigned long seg;
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} mm_segment_t;
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#ifdef CONFIG_METAG_FPU
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struct meta_fpu_context {
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TBICTXEXTFPU fpstate;
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union {
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struct {
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TBICTXEXTBB4 fx8_15;
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TBICTXEXTFPACC fpacc;
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} fx8_15;
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struct {
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TBICTXEXTFPACC fpacc;
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TBICTXEXTBB4 unused;
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} nofx8_15;
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} extfpstate;
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bool needs_restore;
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};
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#else
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struct meta_fpu_context {};
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#endif
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#ifdef CONFIG_METAG_DSP
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struct meta_ext_context {
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struct {
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TBIEXTCTX ctx;
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TBICTXEXTBB8 bb8;
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TBIDUAL ax[TBICTXEXTAXX_BYTES / sizeof(TBIDUAL)];
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TBICTXEXTHL2 hl2;
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TBICTXEXTTDPR ext;
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TBICTXEXTRP6 rp;
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} regs;
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/* DSPRAM A and B save areas. */
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void *ram[2];
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/* ECH encoded size of DSPRAM save areas. */
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unsigned int ram_sz[2];
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};
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#else
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struct meta_ext_context {};
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#endif
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struct thread_struct {
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PTBICTX kernel_context;
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/* A copy of the user process Sig.SaveMask. */
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unsigned int user_flags;
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struct meta_fpu_context *fpu_context;
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void __user *tls_ptr;
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unsigned short int_depth;
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unsigned short txdefr_failure;
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struct meta_ext_context *dsp_context;
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};
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#define INIT_THREAD { \
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NULL, /* kernel_context */ \
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0, /* user_flags */ \
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NULL, /* fpu_context */ \
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NULL, /* tls_ptr */ \
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1, /* int_depth - we start in kernel */ \
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0, /* txdefr_failure */ \
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NULL, /* dsp_context */ \
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}
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/* Needed to make #define as we are referencing 'current', that is not visible
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* yet.
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*
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* Stack layout is as below.
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argc argument counter (integer)
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argv[0] program name (pointer)
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argv[1...N] program args (pointers)
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argv[argc-1] end of args (integer)
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NULL
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env[0...N] environment variables (pointers)
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NULL
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*/
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#define start_thread(regs, pc, usp) do { \
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unsigned int *argc = (unsigned int *) bprm->exec; \
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set_fs(USER_DS); \
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current->thread.int_depth = 1; \
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/* Force this process down to user land */ \
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regs->ctx.SaveMask = TBICTX_PRIV_BIT; \
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regs->ctx.CurrPC = pc; \
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regs->ctx.AX[0].U0 = usp; \
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regs->ctx.DX[3].U1 = *((int *)argc); /* argc */ \
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regs->ctx.DX[3].U0 = (int)((int *)argc + 1); /* argv */ \
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regs->ctx.DX[2].U1 = (int)((int *)argc + \
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regs->ctx.DX[3].U1 + 2); /* envp */ \
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regs->ctx.DX[2].U0 = 0; /* rtld_fini */ \
|
||||
} while (0)
|
||||
|
||||
/* Forward declaration, a strange C thing */
|
||||
struct task_struct;
|
||||
|
||||
/* Free all resources held by a thread. */
|
||||
static inline void release_thread(struct task_struct *dead_task)
|
||||
{
|
||||
}
|
||||
|
||||
#define copy_segments(tsk, mm) do { } while (0)
|
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#define release_segments(mm) do { } while (0)
|
||||
|
||||
extern void exit_thread(void);
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||||
|
||||
/*
|
||||
* Return saved PC of a blocked thread.
|
||||
*/
|
||||
#define thread_saved_pc(tsk) \
|
||||
((unsigned long)(tsk)->thread.kernel_context->CurrPC)
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||||
#define thread_saved_sp(tsk) \
|
||||
((unsigned long)(tsk)->thread.kernel_context->AX[0].U0)
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||||
#define thread_saved_fp(tsk) \
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((unsigned long)(tsk)->thread.kernel_context->AX[1].U0)
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||||
|
||||
unsigned long get_wchan(struct task_struct *p);
|
||||
|
||||
#define KSTK_EIP(tsk) ((tsk)->thread.kernel_context->CurrPC)
|
||||
#define KSTK_ESP(tsk) ((tsk)->thread.kernel_context->AX[0].U0)
|
||||
|
||||
#define user_stack_pointer(regs) ((regs)->ctx.AX[0].U0)
|
||||
|
||||
#define cpu_relax() barrier()
|
||||
|
||||
extern void setup_txprivext(void);
|
||||
|
||||
static inline unsigned int hard_processor_id(void)
|
||||
{
|
||||
unsigned int id;
|
||||
|
||||
asm volatile ("MOV %0, TXENABLE\n"
|
||||
"AND %0, %0, %1\n"
|
||||
"LSR %0, %0, %2\n"
|
||||
: "=&d" (id)
|
||||
: "I" (TXENABLE_THREAD_BITS),
|
||||
"K" (TXENABLE_THREAD_S)
|
||||
);
|
||||
|
||||
return id;
|
||||
}
|
||||
|
||||
#define OP3_EXIT 0
|
||||
|
||||
#define HALT_OK 0
|
||||
#define HALT_PANIC -1
|
||||
|
||||
/*
|
||||
* Halt (stop) the hardware thread. This instruction sequence is the
|
||||
* standard way to cause a Meta hardware thread to exit. The exit code
|
||||
* is pushed onto the stack which is interpreted by the debug adapter.
|
||||
*/
|
||||
static inline void hard_processor_halt(int exit_code)
|
||||
{
|
||||
asm volatile ("MOV D1Ar1, %0\n"
|
||||
"MOV D0Ar6, %1\n"
|
||||
"MSETL [A0StP],D0Ar6,D0Ar4,D0Ar2\n"
|
||||
"1:\n"
|
||||
"SWITCH #0xC30006\n"
|
||||
"B 1b\n"
|
||||
: : "r" (exit_code), "K" (OP3_EXIT));
|
||||
}
|
||||
|
||||
/* Set these hooks to call SoC specific code to restart/halt/power off. */
|
||||
extern void (*soc_restart)(char *cmd);
|
||||
extern void (*soc_halt)(void);
|
||||
|
||||
extern void show_trace(struct task_struct *tsk, unsigned long *sp,
|
||||
struct pt_regs *regs);
|
||||
|
||||
#endif
|
||||
|
|
@ -0,0 +1 @@
|
|||
#include <linux/byteorder/little_endian.h>
|
||||
|
|
@ -0,0 +1,7 @@
|
|||
#ifndef _UAPI_METAG_RESOURCE_H
|
||||
#define _UAPI_METAG_RESOURCE_H
|
||||
|
||||
#define _STK_LIM_MAX (1 << 28)
|
||||
#include <asm-generic/resource.h>
|
||||
|
||||
#endif /* _UAPI_METAG_RESOURCE_H */
|
||||
|
|
@ -0,0 +1,26 @@
|
|||
#ifndef __ASM_METAG_SWAB_H
|
||||
#define __ASM_METAG_SWAB_H
|
||||
|
||||
#include <linux/compiler.h>
|
||||
#include <linux/types.h>
|
||||
#include <asm-generic/swab.h>
|
||||
|
||||
static inline __attribute_const__ __u16 __arch_swab16(__u16 x)
|
||||
{
|
||||
return __builtin_metag_bswaps(x);
|
||||
}
|
||||
#define __arch_swab16 __arch_swab16
|
||||
|
||||
static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
|
||||
{
|
||||
return __builtin_metag_bswap(x);
|
||||
}
|
||||
#define __arch_swab32 __arch_swab32
|
||||
|
||||
static inline __attribute_const__ __u64 __arch_swab64(__u64 x)
|
||||
{
|
||||
return __builtin_metag_bswapll(x);
|
||||
}
|
||||
#define __arch_swab64 __arch_swab64
|
||||
|
||||
#endif /* __ASM_METAG_SWAB_H */
|
||||
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