From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 arch/m32r/include/asm/flat.h | 145 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 145 insertions(+)
 create mode 100644 arch/m32r/include/asm/flat.h

(limited to 'arch/m32r/include/asm/flat.h')

diff --git a/arch/m32r/include/asm/flat.h b/arch/m32r/include/asm/flat.h
new file mode 100644
index 000000000..5d711c468
--- /dev/null
+++ b/arch/m32r/include/asm/flat.h
@@ -0,0 +1,145 @@
+/*
+ * include/asm-m32r/flat.h
+ *
+ * uClinux flat-format executables
+ *
+ * Copyright (C) 2004  Kazuhiro Inaoka
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive for
+ * more details.
+ */
+#ifndef __ASM_M32R_FLAT_H
+#define __ASM_M32R_FLAT_H
+
+#define	flat_argvp_envp_on_stack()		0
+#define	flat_old_ram_flag(flags)		(flags)
+#define	flat_set_persistent(relval, p)		0
+#define	flat_reloc_valid(reloc, size)		\
+	(((reloc) - textlen_for_m32r_lo16_data) <= (size))
+#define flat_get_addr_from_rp(rp, relval, flags, persistent) \
+	m32r_flat_get_addr_from_rp(rp, relval, (text_len) )
+
+#define flat_put_addr_at_rp(rp, addr, relval) \
+	m32r_flat_put_addr_at_rp(rp, addr, relval)
+
+/* Convert a relocation entry into an address.  */
+static inline unsigned long
+flat_get_relocate_addr (unsigned long relval)
+{
+        return relval & 0x00ffffff; /* Mask out top 8-bits */
+}
+
+#define	flat_m32r_get_reloc_type(relval)	((relval) >> 24)
+
+#define M32R_SETH_OPCODE	0xd0c00000 /* SETH instruction code */
+
+#define FLAT_M32R_32		0x00	/* 32bits reloc */
+#define FLAT_M32R_24		0x01	/* unsigned 24bits reloc */
+#define FLAT_M32R_16		0x02	/* 16bits reloc */
+#define FLAT_M32R_LO16		0x03	/* signed low 16bits reloc (low()) */
+#define FLAT_M32R_LO16_DATA	0x04	/* signed low 16bits reloc (low())
+					   for a symbol in .data section */
+					/* High 16bits of an address used
+					   when the lower 16bbits are treated
+					   as unsigned.
+                                           To create SETH instruction only.
+					   0x1X: X means a number of register.
+					   0x10 - 0x3F are reserved. */
+#define FLAT_M32R_HI16_ULO	0x10	/* reloc for SETH Rn,#high(imm16) */
+					/* High 16bits of an address used
+					   when the lower 16bbits are treated
+					   as signed.
+                                           To create SETH instruction only.
+					   0x2X: X means a number of register.
+					   0x20 - 0x4F are reserved. */
+#define FLAT_M32R_HI16_SLO	0x20	/* reloc for SETH Rn,#shigh(imm16) */
+
+static unsigned long textlen_for_m32r_lo16_data = 0;
+
+static inline unsigned long m32r_flat_get_addr_from_rp (unsigned long *rp,
+                                                        unsigned long relval,
+						        unsigned long textlen)
+{
+        unsigned int reloc = flat_m32r_get_reloc_type (relval);
+	textlen_for_m32r_lo16_data = 0;
+	if (reloc & 0xf0) {
+		unsigned long addr = htonl(*rp);
+		switch (reloc & 0xf0)
+		{
+		case FLAT_M32R_HI16_ULO:
+		case FLAT_M32R_HI16_SLO:
+			if (addr == 0) {
+				/* put "seth Rn,#0x0" instead of 0 (addr). */
+				*rp = (M32R_SETH_OPCODE | ((reloc & 0x0f)<<24));
+			}
+			return addr;
+		default:
+			break;
+		}
+	} else {
+		switch (reloc)
+		{
+		case FLAT_M32R_LO16:
+			return htonl(*rp) & 0xFFFF;
+		case FLAT_M32R_LO16_DATA:
+                        /* FIXME: The return value will decrease by textlen
+			   at m32r_flat_put_addr_at_rp () */
+			textlen_for_m32r_lo16_data = textlen;
+			return (htonl(*rp) & 0xFFFF) + textlen;
+		case FLAT_M32R_16:
+			return htons(*(unsigned short *)rp) & 0xFFFF;
+		case FLAT_M32R_24:
+			return htonl(*rp) & 0xFFFFFF;
+		case FLAT_M32R_32:
+			return htonl(*rp);
+		default:
+			break;
+		}
+	}
+	return ~0;      /* bogus value */
+}
+
+static inline void m32r_flat_put_addr_at_rp (unsigned long *rp,
+					     unsigned long addr,
+                                             unsigned long relval)
+{
+        unsigned int reloc = flat_m32r_get_reloc_type (relval);
+	if (reloc & 0xf0) {
+		unsigned long Rn = reloc & 0x0f; /* get a number of register */
+		Rn <<= 24; /* 0x0R000000 */
+		reloc &= 0xf0;
+		switch (reloc)
+		{
+		case FLAT_M32R_HI16_ULO: /* To create SETH Rn,#high(imm16) */
+			*rp = (M32R_SETH_OPCODE | Rn
+			       | ((addr >> 16) & 0xFFFF));
+			break;
+		case FLAT_M32R_HI16_SLO: /* To create SETH Rn,#shigh(imm16) */
+			*rp = (M32R_SETH_OPCODE | Rn
+			       | (((addr >> 16) + ((addr & 0x8000) ? 1 : 0))
+				  & 0xFFFF));
+			break;
+		}
+	} else {
+		switch (reloc) {
+		case FLAT_M32R_LO16_DATA:
+			addr -= textlen_for_m32r_lo16_data;
+			textlen_for_m32r_lo16_data = 0;
+		case FLAT_M32R_LO16:
+			*rp = (htonl(*rp) & 0xFFFF0000) | (addr & 0xFFFF);
+			break;
+		case FLAT_M32R_16:
+			*(unsigned short *)rp = addr & 0xFFFF;
+			break;
+		case FLAT_M32R_24:
+			*rp = (htonl(*rp) & 0xFF000000) | (addr & 0xFFFFFF);
+			break;
+		case FLAT_M32R_32:
+			*rp = addr;
+			break;
+		}
+	}
+}
+
+#endif /* __ASM_M32R_FLAT_H */
-- 
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