More Kconfig files

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4632 42af7a65-404d-4744-a932-0658087f49c3

arch/x86/Kconfig

@@ -2,3 +2,30 @@
 # For a description of the syntax of this configuration file,
 # see misc/tools/kconfig-language.txt.
 #
+
+if ARCH_X86
+choice
+	prompt "x86 chip selection"
+	default ARCH_I486
+
+config ARCH_I486
+	bool "i486"
+	---help---
+		Intel i486 architecture
+
+endchoice
+
+config ARCH_CHIP_QEMU
+	bool "Qemu x86 emulation"
+	---help---
+		Intel i486 architecture
+
+config ARCH_CHIP
+	string
+	default "qemu"		if ARCH_CHIP_QEMU
+
+source arch/x86/src/common/Kconfig
+source arch/x86/src/i486/Kconfig
+source arch/x86/src/qemu/Kconfig
+
+endif

arch/x86/src/common/Kconfig

@@ -0,0 +1,7 @@
+#
+# For a description of the syntax of this configuration file,
+# see misc/tools/kconfig-language.txt.
+#
+
+if ARCH_X86
+endif

arch/x86/src/i486/Kconfig

@@ -0,0 +1,7 @@
+#
+# For a description of the syntax of this configuration file,
+# see misc/tools/kconfig-language.txt.
+#
+
+if ARCH_I486
+endif

arch/x86/src/qemu/Kconfig

@@ -0,0 +1,7 @@
+#
+# For a description of the syntax of this configuration file,
+# see misc/tools/kconfig-language.txt.
+#
+
+if ARCH_CHIP_QEMU
+endif

arch/z16/Kconfig

@@ -2,3 +2,44 @@
 # For a description of the syntax of this configuration file,
 # see misc/tools/kconfig-language.txt.
 #
+
+if ARCH_Z16
+
+choice
+	prompt "ZNEO chip selection"
+	default ARCH_CHIP_Z16F2811
+
+config ARCH_CHIP_Z16F2810
+	bool "Z16F2810"
+	---help---
+		ZiLOG Z16F2810
+
+config ARCH_CHIP_Z16F2811
+	bool "Z16F2811"
+	---help---
+		ZiLOG Z16F2811
+
+config ARCH_CHIP_Z16F3211
+	bool "Z16F321"
+	---help---
+		ZiLOG Z16F321
+
+config ARCH_CHIP_Z16F6411
+	bool "Z16F6411"
+	---help---
+		ZiLOG Z16F6411
+
+endchoice
+
+config ARCH_CHIP_Z16F
+	bool
+	default y			if ARCH_CHIP_Z16F2810 || ARCH_CHIP_Z16F2811 || ARCH_CHIP_Z16F3211 || ARCH_CHIP_Z16F6411
+
+config ARCH_CHIP
+	string
+	default "z16f"		if ARCH_CHIP_Z16F
+
+source arch/z16/src/common/Kconfig
+source arch/z16/src/z16f/Kconfig
+
+endif

arch/z16/src/common/Kconfig

@@ -0,0 +1,7 @@
+#
+# For a description of the syntax of this configuration file,
+# see misc/tools/kconfig-language.txt.
+#
+
+if ARCH_Z16
+endif

arch/z16/src/z16f/Kconfig

@@ -0,0 +1,7 @@
+#
+# For a description of the syntax of this configuration file,
+# see misc/tools/kconfig-language.txt.
+#
+
+if ARCH_CHIP_Z16F
+endif

arch/z80/Kconfig

@@ -2,3 +2,71 @@
 # For a description of the syntax of this configuration file,
 # see misc/tools/kconfig-language.txt.
 #
+
+if ARCH_Z80
+choice
+	prompt "ZiLOG 8-bit MCU"
+	default ARCH_CHIP_Z80
+
+config ARCH_CHIP_Z80
+	bool "Classic z80"
+	---help---
+		Classic ZiLOG z80 chip
+
+config ARCH_CHIP_Z8F640X
+	bool "Z8F640X"
+	---help---
+		ZiLOG Z8F640X (z8 Encore)
+
+config ARCH_CHIP_Z8F6403
+	bool "Z8F6403"
+	---help---
+		ZiLOG Z8F6403 (z8 Encore)
+
+config ARCH_CHIP_Z8F642X
+	bool "Z8F642X"
+	---help---
+		ZiLOG Z8F642X (z8 Encore)
+
+config ARCH_CHIP_Z8F6423
+	bool "Z8F6423"
+	---help---
+		ZiLOG Z8F6423 (z8 Encore)
+
+config ARCH_CHIP_EZ80F91
+	bool "EZ80F91"
+	---help---
+		ZiLOG EZ80F91 (ez80 Acclaim)
+
+config ARCH_CHIP_EZ80F92
+	bool "EZ80F92"
+	---help---
+		ZiLOG EZ80F92 (ez80 Acclaim)
+
+config ARCH_CHIP_EZ80F93
+	bool "EZ80F93"
+	---help---
+		ZiLOG EZ80F93 (ez80 Acclaim)
+
+endchoice
+
+config ARCH_CHIP_Z8
+	bool
+	default y			if ARCH_CHIP_Z8F640X || ARCH_CHIP_Z8F6403 || ARCH_CHIP_Z8F642X || ARCH_CHIP_Z8F6423
+
+config ARCH_CHIP_EZ80
+	bool
+	default y			if ARCH_CHIP_EZ80F91 || ARCH_CHIP_EZ80F92 || ARCH_CHIP_EZ80F93
+
+config ARCH_CHIP
+	string
+	default "z80"		if ARCH_CHIP_Z80
+	default "z8"		if ARCH_CHIP_Z8
+	default "ez80"		if ARCH_CHIP_EZ80
+
+source "arch/z80/src/common/Kconfig"
+source "arch/z80/src/z80/Kconfig"
+source "arch/z80/src/z8/Kconfig"
+source "arch/z80/src/ez80/Kconfig"
+
+endif

arch/z80/src/common/Kconfig

@@ -0,0 +1,7 @@
+#
+# For a description of the syntax of this configuration file,
+# see misc/tools/kconfig-language.txt.
+#
+
+if ARCH_Z80
+endif

arch/z80/src/ez80/Kconfig

@@ -0,0 +1,7 @@
+#
+# For a description of the syntax of this configuration file,
+# see misc/tools/kconfig-language.txt.
+#
+
+if ARCH_CHIP_EZ80
+endif

arch/z80/src/z8/Kconfig

@@ -0,0 +1,7 @@
+#
+# For a description of the syntax of this configuration file,
+# see misc/tools/kconfig-language.txt.
+#
+
+if ARCH_CHIP_Z8
+endif

arch/z80/src/z80/Kconfig

@@ -0,0 +1,7 @@
+#
+# For a description of the syntax of this configuration file,
+# see misc/tools/kconfig-language.txt.
+#
+
+if ARCH_CHIP_Z80
+endif

drivers/serial/serial.c

@@ -329,6 +329,10 @@ static ssize_t uart_read(FAR struct file *filep, FAR char *buffer, size_t buflen
        * the head index but must not modify the tail index.  The tail
        * index is only modified in this function.  Therefore, no
        * special handshaking is required here.
+       *
+       * The head and tail pointers are 16-bit values.  The only time that
+       * the following could be unsafe is if the CPU made two non-atomic
+       * 8-bit accesses to obtain the 16-bit head index.
        */
 
       tail = dev->recv.tail;