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utcb.h
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/*
* (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>,
* Alexander Warg <warg@os.inf.tu-dresden.de>
* economic rights: Technische Universität Dresden (Germany)
*
* License: see LICENSE.spdx (in this directory or the directories above)
*/
#ifndef __L4_SYS__INCLUDE__ARCH_ARM64__UTCB_H__
#define __L4_SYS__INCLUDE__ARCH_ARM64__UTCB_H__
#include <l4/sys/types.h>
typedef struct l4_exc_regs_t
{
l4_umword_t eret_work;
l4_umword_t r[31];
l4_umword_t reserved;
l4_umword_t err;
l4_umword_t pfa;
l4_umword_t sp;
union { l4_umword_t ip; l4_umword_t pc; }; /* aliases for PC */
union { l4_umword_t flags; l4_umword_t pstate; }; /* aliases for PSTATE (PSR) */
l4_umword_t tpidruro;
l4_umword_t tpidrurw;
} l4_exc_regs_t;
enum L4_utcb_consts_arm64
{
L4_UTCB_EXCEPTION_REGS_SIZE = sizeof(l4_exc_regs_t) / sizeof(l4_umword_t),
L4_UTCB_GENERIC_DATA_SIZE = 63,
L4_UTCB_GENERIC_BUFFERS_SIZE = 58,
L4_UTCB_MSG_REGS_OFFSET = 0,
L4_UTCB_BUF_REGS_OFFSET = 64 * sizeof(l4_umword_t),
L4_UTCB_THREAD_REGS_OFFSET = 123 * sizeof(l4_umword_t),
L4_UTCB_INHERIT_FPU = 1UL << 24,
L4_UTCB_OFFSET = 1024,
};
#include_next <l4/sys/utcb.h>
/*
* ==================================================================
* Implementations.
*/
#ifdef __GNUC__
L4_INLINE l4_utcb_t *l4_utcb_direct(void) L4_NOTHROW
{
l4_utcb_t *utcb;
__asm__ ("mrs %0, TPIDRRO_EL0" : "=r" (utcb));
return utcb;
}
#endif
L4_INLINE l4_umword_t l4_utcb_exc_pc(l4_exc_regs_t const *u) L4_NOTHROW
{
return u->pc;
}
L4_INLINE void l4_utcb_exc_pc_set(l4_exc_regs_t *u, l4_addr_t pc) L4_NOTHROW
{
u->pc = pc;
}
L4_INLINE l4_umword_t l4_utcb_exc_typeval(l4_exc_regs_t const *u) L4_NOTHROW
{
return u->err >> 26;
}
L4_INLINE int l4_utcb_exc_is_pf(l4_exc_regs_t const *u) L4_NOTHROW
{
return ((u->err >> 26) & 0x30) == 0x20;
}
L4_INLINE l4_addr_t l4_utcb_exc_pfa(l4_exc_regs_t const *u) L4_NOTHROW
{
return (u->pfa & ~7UL) | ((u->err >> 5) & 2);
}
L4_INLINE int l4_utcb_exc_is_ex_regs_exception(l4_exc_regs_t const *u) L4_NOTHROW
{
return (u->err >> 26) == 0x3e;
}
#endif /* ! __L4_SYS__INCLUDE__ARCH_ARM64__UTCB_H__ */
l4_umword_t
unsigned long l4_umword_t
Unsigned machine word.
Definition l4int.h:40
l4_addr_t
unsigned long l4_addr_t
Address type.
Definition l4int.h:34
L4_utcb_consts_arm64
L4_utcb_consts_arm64
UTCB constants for ARM64.
Definition utcb.h:48
l4_utcb_t
struct l4_utcb_t l4_utcb_t
Opaque type for the UTCB.
Definition utcb.h:56
l4_utcb_exc_pfa
l4_addr_t l4_utcb_exc_pfa(l4_exc_regs_t const *u) L4_NOTHROW
Function to get the L4 style page fault address out of an exception.
Definition utcb.h:112
l4_utcb_exc_is_ex_regs_exception
int l4_utcb_exc_is_ex_regs_exception(l4_exc_regs_t const *u) L4_NOTHROW
Check whether an exception IPC was triggered via l4_thread_ex_regs().
Definition utcb.h:117
l4_utcb_exc_is_pf
int l4_utcb_exc_is_pf(l4_exc_regs_t const *u) L4_NOTHROW
Check whether an exception IPC is a page fault.
Definition utcb.h:107
l4_utcb_exc_pc
l4_umword_t l4_utcb_exc_pc(l4_exc_regs_t const *u) L4_NOTHROW
Access function to get the program counter of the exception state.
Definition utcb.h:92
l4_utcb_exc_typeval
l4_umword_t l4_utcb_exc_typeval(l4_exc_regs_t const *u) L4_NOTHROW
Get the value out of an exception UTCB that describes the type of exception.
Definition utcb.h:102
l4_utcb_exc_pc_set
void l4_utcb_exc_pc_set(l4_exc_regs_t *u, l4_addr_t pc) L4_NOTHROW
Set the program counter register in the exception state.
Definition utcb.h:97
L4_NOTHROW
#define L4_NOTHROW
Mark a function declaration and definition as never throwing an exception.
Definition compiler.h:161
L4_INLINE
#define L4_INLINE
L4 Inline function attribute.
Definition compiler.h:51
types.h
Common L4 ABI Data Types.
l4_exc_regs_t
UTCB structure for exceptions.
Definition utcb.h:28
l4_exc_regs_t::r
l4_umword_t r[13]
registers
Definition utcb.h:32
l4_exc_regs_t::sp
l4_umword_t sp
stack pointer
Definition utcb.h:33
l4_exc_regs_t::pfa
l4_umword_t pfa
page fault address
Definition utcb.h:29
l4_exc_regs_t::ip
l4_umword_t ip
instruction pointer
Definition utcb.h:36
l4_exc_regs_t::flags
l4_umword_t flags
rflags
Definition utcb.h:37
l4_exc_regs_t::tpidrurw
l4_umword_t tpidrurw
Thread-ID register.
Definition utcb.h:39
l4_exc_regs_t::err
l4_umword_t err
error code
Definition utcb.h:30
l4_exc_regs_t::tpidruro
l4_umword_t tpidruro
Thread-ID register.
Definition utcb.h:38
l4_exc_regs_t::pc
l4_umword_t pc
pc
Definition utcb.h:36