+#include <common.h>
#include <exports.h>
+#include <linux/compiler.h>
-#ifndef GCC_VERSION
-#define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__)
-#endif /* GCC_VERSION */
+#define FO(x) offsetof(struct jt_funcs, x)
-#if defined(CONFIG_I386)
+#if defined(CONFIG_X86)
/*
* x86 does not have a dedicated register to store the pointer to
* the global_data. Thus the jump table address is stored in a
* from flash memory. The global_data address is passed as argv[-1]
* to the application program.
*/
-static void **jt;
+static struct jt_funcs *jt;
gd_t *global_data;
-#define EXPORT_FUNC(x) \
+#define EXPORT_FUNC(f, a, x, ...) \
asm volatile ( \
" .globl " #x "\n" \
#x ":\n" \
" movl %0, %%eax\n" \
" movl jt, %%ecx\n" \
" jmp *(%%ecx, %%eax)\n" \
- : : "i"(XF_ ## x * sizeof(void *)) : "eax", "ecx");
+ : : "i"(FO(x)) : "eax", "ecx");
#elif defined(CONFIG_PPC)
/*
* r2 holds the pointer to the global_data, r11 is a call-clobbered
* register
*/
-#define EXPORT_FUNC(x) \
+#define EXPORT_FUNC(f, a, x, ...) \
asm volatile ( \
" .globl " #x "\n" \
#x ":\n" \
" lwz %%r11, %1(%%r11)\n" \
" mtctr %%r11\n" \
" bctr\n" \
- : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "r11");
+ : : "i"(offsetof(gd_t, jt)), "i"(FO(x)) : "r11");
#elif defined(CONFIG_ARM)
+#ifdef CONFIG_ARM64
+/*
+ * x18 holds the pointer to the global_data, x9 is a call-clobbered
+ * register
+ */
+#define EXPORT_FUNC(f, a, x, ...) \
+ asm volatile ( \
+" .globl " #x "\n" \
+#x ":\n" \
+" ldr x9, [x18, %0]\n" \
+" ldr x9, [x9, %1]\n" \
+" br x9\n" \
+ : : "i"(offsetof(gd_t, jt)), "i"(FO(x)) : "x9");
+#else
/*
- * r8 holds the pointer to the global_data, ip is a call-clobbered
+ * r9 holds the pointer to the global_data, ip is a call-clobbered
* register
*/
-#define EXPORT_FUNC(x) \
+#define EXPORT_FUNC(f, a, x, ...) \
asm volatile ( \
" .globl " #x "\n" \
#x ":\n" \
-" ldr ip, [r8, %0]\n" \
+" ldr ip, [r9, %0]\n" \
" ldr pc, [ip, %1]\n" \
- : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "ip");
+ : : "i"(offsetof(gd_t, jt)), "i"(FO(x)) : "ip");
+#endif
#elif defined(CONFIG_MIPS)
+#ifdef CONFIG_CPU_MIPS64
/*
* k0 ($26) holds the pointer to the global_data; t9 ($25) is a call-
* clobbered register that is also used to set gp ($26). Note that the
* it; however, GCC/mips generates an additional `nop' after each asm
* statement
*/
-#define EXPORT_FUNC(x) \
+#define EXPORT_FUNC(f, a, x, ...) \
asm volatile ( \
" .globl " #x "\n" \
#x ":\n" \
-" lw $25, %0($26)\n" \
-" lw $25, %1($25)\n" \
+" ld $25, %0($26)\n" \
+" ld $25, %1($25)\n" \
" jr $25\n" \
- : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "t9");
-#elif defined(CONFIG_NIOS)
+ : : "i"(offsetof(gd_t, jt)), "i"(FO(x)) : "t9");
+#else
/*
- * %g7 holds the pointer to the global_data. %g0 is call clobbered.
+ * k0 ($26) holds the pointer to the global_data; t9 ($25) is a call-
+ * clobbered register that is also used to set gp ($26). Note that the
+ * jr instruction also executes the instruction immediately following
+ * it; however, GCC/mips generates an additional `nop' after each asm
+ * statement
*/
-#define EXPORT_FUNC(x) \
+#define EXPORT_FUNC(f, a, x, ...) \
asm volatile ( \
" .globl " #x "\n" \
#x ":\n" \
-" pfx %%hi(%0)\n" \
-" movi %%g0, %%lo(%0)\n" \
-" add %%g0, %%g7\n" \
-" ld %%g0, [%%g0]\n" \
-" pfx %1\n" \
-" ld %%g0, [%%g0]\n" \
-" jmp %%g0\n" \
-" nop \n" \
- : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x) : "r0");
+" lw $25, %0($26)\n" \
+" lw $25, %1($25)\n" \
+" jr $25\n" \
+ : : "i"(offsetof(gd_t, jt)), "i"(FO(x)) : "t9");
+#endif
#elif defined(CONFIG_NIOS2)
/*
* gp holds the pointer to the global_data, r8 is call-clobbered
*/
-#define EXPORT_FUNC(x) \
+#define EXPORT_FUNC(f, a, x, ...) \
asm volatile ( \
" .globl " #x "\n" \
#x ":\n" \
" ldw r8, 0(r8)\n" \
" ldw r8, %1(r8)\n" \
" jmp r8\n" \
- : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "gp");
+ : : "i"(offsetof(gd_t, jt)), "i"(FO(x)) : "gp");
#elif defined(CONFIG_M68K)
/*
* d7 holds the pointer to the global_data, a0 is a call-clobbered
* register
*/
-#define EXPORT_FUNC(x) \
+#define EXPORT_FUNC(f, a, x, ...) \
asm volatile ( \
" .globl " #x "\n" \
#x ":\n" \
" adda.l %1, %%a0\n" \
" move.l (%%a0), %%a0\n" \
" jmp (%%a0)\n" \
- : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "a0");
+ : : "i"(offsetof(gd_t, jt)), "i"(FO(x)) : "a0");
#elif defined(CONFIG_MICROBLAZE)
/*
* r31 holds the pointer to the global_data. r5 is a call-clobbered.
*/
-#define EXPORT_FUNC(x) \
+#define EXPORT_FUNC(f, a, x, ...) \
asm volatile ( \
" .globl " #x "\n" \
#x ":\n" \
" lwi r5, r31, %0\n" \
" lwi r5, r5, %1\n" \
" bra r5\n" \
- : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "r5");
-#elif defined(CONFIG_BLACKFIN)
-/*
- * P3 holds the pointer to the global_data, P0 is a call-clobbered
- * register
- */
-#define EXPORT_FUNC(x) \
- asm volatile ( \
-" .globl _" #x "\n_" \
-#x ":\n" \
-" P0 = [P3 + %0]\n" \
-" P0 = [P0 + %1]\n" \
-" JUMP (P0)\n" \
- : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "P0");
+ : : "i"(offsetof(gd_t, jt)), "i"(FO(x)) : "r5");
#elif defined(CONFIG_AVR32)
/*
* r6 holds the pointer to the global_data. r8 is call clobbered.
*/
-#define EXPORT_FUNC(x) \
+#define EXPORT_FUNC(f, a, x, ...) \
asm volatile( \
" .globl\t" #x "\n" \
#x ":\n" \
" ld.w r8, r6[%0]\n" \
" ld.w pc, r8[%1]\n" \
: \
- : "i"(offsetof(gd_t, jt)), "i"(XF_ ##x) \
+ : "i"(offsetof(gd_t, jt)), "i"(FO(x)) \
: "r8");
#elif defined(CONFIG_SH)
/*
* r13 holds the pointer to the global_data. r1 is a call clobbered.
*/
-#define EXPORT_FUNC(x) \
+#define EXPORT_FUNC(f, a, x, ...) \
asm volatile ( \
" .align 2\n" \
" .globl " #x "\n" \
" jmp @r1\n" \
" nop\n" \
" nop\n" \
- : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "r1", "r2");
-#elif defined(CONFIG_SPARC)
+ : : "i"(offsetof(gd_t, jt)), "i"(FO(x)) : "r1", "r2");
+#elif defined(CONFIG_NDS32)
/*
- * g7 holds the pointer to the global_data. g1 is call clobbered.
+ * r16 holds the pointer to the global_data. gp is call clobbered.
+ * not support reduced register (16 GPR).
+ */
+#define EXPORT_FUNC(f, a, x, ...) \
+ asm volatile ( \
+" .globl " #x "\n" \
+#x ":\n" \
+" lwi $r16, [$gp + (%0)]\n" \
+" lwi $r16, [$r16 + (%1)]\n" \
+" jr $r16\n" \
+ : : "i"(offsetof(gd_t, jt)), "i"(FO(x)) : "$r16");
+#elif defined(CONFIG_OPENRISC)
+/*
+ * r10 holds the pointer to the global_data, r13 is a call-clobbered
+ * register
+ */
+#define EXPORT_FUNC(f, a, x, ...) \
+ asm volatile ( \
+" .globl " #x "\n" \
+#x ":\n" \
+" l.lwz r13, %0(r10)\n" \
+" l.lwz r13, %1(r13)\n" \
+" l.jr r13\n" \
+" l.nop\n" \
+ : : "i"(offsetof(gd_t, jt)), "i"(FO(x)) : "r13");
+#elif defined(CONFIG_ARC)
+/*
+ * r25 holds the pointer to the global_data. r10 is call clobbered.
+ */
+#define EXPORT_FUNC(f, a, x, ...) \
+ asm volatile( \
+" .align 4\n" \
+" .globl " #x "\n" \
+#x ":\n" \
+" ld r10, [r25, %0]\n" \
+" ld r10, [r10, %1]\n" \
+" j [r10]\n" \
+ : : "i"(offsetof(gd_t, jt)), "i"(FO(x)) : "r10");
+#elif defined(CONFIG_XTENSA)
+/*
+ * Global data ptr is in global_data, jump table ptr is in jt.
+ * Windowed ABI: Jump just past 'entry' in target and adjust stack frame
+ * (extract stack frame size from target 'entry' instruction).
*/
-#define EXPORT_FUNC(x) \
- asm volatile( \
-" .globl\t" #x "\n" \
-#x ":\n" \
-" set %0, %%g1\n" \
-" or %%g1, %%g7, %%g1\n" \
-" ld [%%g1], %%g1\n" \
-" ld [%%g1 + %1], %%g1\n" \
-" jmp %%g1\n" \
-" nop\n" \
- : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "g1" );
+static void **jt;
+
+#if defined(__XTENSA_CALL0_ABI__)
+#define EXPORT_FUNC(f, a, x, ...) \
+ asm volatile ( \
+" .extern jt\n" \
+" .globl " #x "\n" \
+" .align 4\n" \
+#x ":\n" \
+" l32i a8, %0, 0\n" \
+" l32i a8, a8, %1\n" \
+" jx a8\n" \
+ : : "r"(jt), "i" (FO(x)) : "a8");
+#elif defined(__XTENSA_WINDOWED_ABI__)
+#if XCHAL_HAVE_BE
+# define SFT "8"
#else
+# define SFT "12"
+#endif
+#define EXPORT_FUNC(f, a, x, ...) \
+ asm volatile ( \
+" .extern jt\n" \
+" .globl " #x "\n" \
+" .align 4\n" \
+#x ":\n" \
+" entry sp, 16\n" \
+" l32i a8, %0, 0\n" \
+" l32i a8, a8, %1\n" \
+" l32i a9, a8, 0\n" \
+" extui a9, a9, " SFT ", 12\n" \
+" subx8 a9, a9, sp\n" \
+" movi a10, 16\n" \
+" sub a9, a10, a9\n" \
+" movsp sp, a9\n" \
+" addi a8, a8, 3\n" \
+" jx a8\n" \
+ : : "r"(jt), "i" (FO(x)) : "a8", "a9", "a10");
+#else
+#error Unsupported Xtensa ABI
+#endif
+#else
+/*" addi $sp, $sp, -24\n" \
+" br $r16\n" \*/
+
#error stubs definition missing for this architecture
#endif
* implementation. On the other hand, asm() statements with
* arguments can be used only inside the functions (gcc limitation)
*/
-#if GCC_VERSION < 3004
+#if GCC_VERSION < 30400
static
#endif /* GCC_VERSION */
void __attribute__((unused)) dummy(void)
#include <_exports.h>
}
-extern unsigned long __bss_start, _end;
+#include <asm/sections.h>
-void app_startup(char **argv)
+void app_startup(char * const *argv)
{
- unsigned char * cp = (unsigned char *) &__bss_start;
+ char *cp = __bss_start;
/* Zero out BSS */
- while (cp < (unsigned char *)&_end) {
+ while (cp < _end)
*cp++ = 0;
- }
-#if defined(CONFIG_I386)
+#if defined(CONFIG_X86)
/* x86 does not have a dedicated register for passing global_data */
global_data = (gd_t *)argv[-1];
jt = global_data->jt;
projects / oweals / u-boot.git / blobdiff