diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 7a1640d260e..ee4eeae427a 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -47,7 +47,7 @@ menu "Platform General Configuration"
 
 choice
 prompt "Platform Configuration"
-default PLATFORM_PCPENTIUM4
+default PLATFORM_QUARK
 
 config PLATFORM_ATOM_N28XX
 	bool "Minimum configuration for ATOM N28XX platform"
@@ -73,17 +73,6 @@ config PLATFORM_PCMINUTEIA
 	select EXTRA_SERIAL_PORT
 	select PLATFORM_GENERIC_PC
 
-config PLATFORM_PCPENTIUM4
-	bool "Minimum configuration for PENTIUM 4 platform"
-	select CPU_PENTIUM4
-	select PIC
-	select PIT
-	select BOI_HANDLER_SUPPORTED
-	select EOI_HANDLER_SUPPORTED
-	select BOOTLOADER_UNKNOWN
-	select EXTRA_SERIAL_PORT
-	select PLATFORM_GENERIC_PC
-
 config PLATFORM_QUARK
 	bool "Minimum configuration for QUARK platform"
 	select CPU_MINUTEIA
@@ -106,7 +95,7 @@ config PLATFORM_GENERIC_PC
 
 choice
 prompt "Intel Processor"
-default CPU_PENTIUM4
+default CPU_MINUTEIA
 
 config CPU_ATOM
 	bool "Atom"
@@ -117,11 +106,6 @@ config CPU_MINUTEIA
 	bool "Minute IA"
 	help
 	This option signifies the use of a CPU from the Minute IA family.
-
-config CPU_PENTIUM4
-	bool "Pentium 4"
-	help
-	This option signifies the use of a CPU from the Pentium 4 family.
 endchoice
 
 config ADVANCED_IDLE
@@ -170,7 +154,7 @@ menu "Specific CPU Capability Support"
 
 config ISA_IA32
 	bool
-	default y if CPU_ATOM || CPU_MINUTEIA || CPU_PENTIUM4
+	default y if CPU_ATOM || CPU_MINUTEIA
 	default n
 	help
 	This option signifies the use of a CPU based on the Intel IA-32
@@ -215,7 +199,7 @@ config CPU_SSE_UNSUPPORTED
 
 config CACHE_LINE_SIZE
 	int "Cache line size"
-	default 64 if CPU_ATOM || CPU_PENTIUM4
+	default 64 if CPU_ATOM
 	default 0
 	help
 	Size in bytes of a CPU cache line.
diff --git a/arch/x86/configs/micro_generic_pc_atom_n28xx_defconfig b/arch/x86/configs/micro_generic_pc_atom_n28xx_defconfig
index fca1565fc1a..085f5712873 100644
--- a/arch/x86/configs/micro_generic_pc_atom_n28xx_defconfig
+++ b/arch/x86/configs/micro_generic_pc_atom_n28xx_defconfig
@@ -105,12 +105,10 @@ CONFIG_EOI_HANDLER_SUPPORTED=y
 #
 CONFIG_PLATFORM_ATOM_N28XX=y
 # CONFIG_PLATFORM_PCMINUTEIA is not set
-# CONFIG_PLATFORM_PCPENTIUM4 is not set
 # CONFIG_PLATFORM_QUARK is not set
 CONFIG_PLATFORM_GENERIC_PC=y
 CONFIG_CPU_ATOM=y
 # CONFIG_CPU_MINUTEIA is not set
-# CONFIG_CPU_PENTIUM4 is not set
 # CONFIG_CPU_MIGHT_SUPPORT_CLFLUSH is not set
 
 #
diff --git a/arch/x86/configs/micro_generic_pc_minuteia_defconfig b/arch/x86/configs/micro_generic_pc_minuteia_defconfig
index b246a3daf79..481159db0a7 100644
--- a/arch/x86/configs/micro_generic_pc_minuteia_defconfig
+++ b/arch/x86/configs/micro_generic_pc_minuteia_defconfig
@@ -105,12 +105,10 @@ CONFIG_EOI_HANDLER_SUPPORTED=y
 #
 # CONFIG_PLATFORM_ATOM_N28XX is not set
 CONFIG_PLATFORM_PCMINUTEIA=y
-# CONFIG_PLATFORM_PCPENTIUM4 is not set
 # CONFIG_PLATFORM_QUARK is not set
 CONFIG_PLATFORM_GENERIC_PC=y
 # CONFIG_CPU_ATOM is not set
 CONFIG_CPU_MINUTEIA=y
-# CONFIG_CPU_PENTIUM4 is not set
 # CONFIG_CPU_MIGHT_SUPPORT_CLFLUSH is not set
 
 #
diff --git a/arch/x86/configs/micro_quark_defconfig b/arch/x86/configs/micro_quark_defconfig
index fed202f15a7..7e67381d7d0 100644
--- a/arch/x86/configs/micro_quark_defconfig
+++ b/arch/x86/configs/micro_quark_defconfig
@@ -105,12 +105,10 @@ CONFIG_EOI_HANDLER_SUPPORTED=y
 #
 # CONFIG_PLATFORM_ATOM_N28XX is not set
 # CONFIG_PLATFORM_PCMINUTEIA is not set
-# CONFIG_PLATFORM_PCPENTIUM4 is not set
 CONFIG_PLATFORM_QUARK=y
 # CONFIG_PLATFORM_GENERIC_PC is not set
 # CONFIG_CPU_ATOM is not set
 CONFIG_CPU_MINUTEIA=y
-# CONFIG_CPU_PENTIUM4 is not set
 # CONFIG_CPU_MIGHT_SUPPORT_CLFLUSH is not set
 
 #
diff --git a/arch/x86/configs/nano_generic_pc_atom_n28xx_defconfig b/arch/x86/configs/nano_generic_pc_atom_n28xx_defconfig
index f042827e651..6079597198a 100644
--- a/arch/x86/configs/nano_generic_pc_atom_n28xx_defconfig
+++ b/arch/x86/configs/nano_generic_pc_atom_n28xx_defconfig
@@ -84,12 +84,10 @@ CONFIG_EOI_HANDLER_SUPPORTED=y
 #
 CONFIG_PLATFORM_ATOM_N28XX=y
 # CONFIG_PLATFORM_PCMINUTEIA is not set
-# CONFIG_PLATFORM_PCPENTIUM4 is not set
 # CONFIG_PLATFORM_QUARK is not set
 CONFIG_PLATFORM_GENERIC_PC=y
 CONFIG_CPU_ATOM=y
 # CONFIG_CPU_MINUTEIA is not set
-# CONFIG_CPU_PENTIUM4 is not set
 # CONFIG_CPU_MIGHT_SUPPORT_CLFLUSH is not set
 
 #
diff --git a/arch/x86/configs/nano_generic_pc_minuteia_defconfig b/arch/x86/configs/nano_generic_pc_minuteia_defconfig
index ef266a699ad..640a1919e02 100644
--- a/arch/x86/configs/nano_generic_pc_minuteia_defconfig
+++ b/arch/x86/configs/nano_generic_pc_minuteia_defconfig
@@ -84,12 +84,10 @@ CONFIG_EOI_HANDLER_SUPPORTED=y
 #
 # CONFIG_PLATFORM_ATOM_N28XX is not set
 CONFIG_PLATFORM_PCMINUTEIA=y
-# CONFIG_PLATFORM_PCPENTIUM4 is not set
 # CONFIG_PLATFORM_QUARK is not set
 CONFIG_PLATFORM_GENERIC_PC=y
 # CONFIG_CPU_ATOM is not set
 CONFIG_CPU_MINUTEIA=y
-# CONFIG_CPU_PENTIUM4 is not set
 # CONFIG_CPU_MIGHT_SUPPORT_CLFLUSH is not set
 
 #
diff --git a/arch/x86/configs/nano_quark_defconfig b/arch/x86/configs/nano_quark_defconfig
index d479d7aeb31..06250937b1a 100644
--- a/arch/x86/configs/nano_quark_defconfig
+++ b/arch/x86/configs/nano_quark_defconfig
@@ -84,12 +84,10 @@ CONFIG_EOI_HANDLER_SUPPORTED=y
 #
 # CONFIG_PLATFORM_ATOM_N28XX is not set
 # CONFIG_PLATFORM_PCMINUTEIA is not set
-# CONFIG_PLATFORM_PCPENTIUM4 is not set
 CONFIG_PLATFORM_QUARK=y
 # CONFIG_PLATFORM_GENERIC_PC is not set
 # CONFIG_CPU_ATOM is not set
 CONFIG_CPU_MINUTEIA=y
-# CONFIG_CPU_PENTIUM4 is not set
 # CONFIG_CPU_MIGHT_SUPPORT_CLFLUSH is not set
 
 #
diff --git a/arch/x86/defconfig b/arch/x86/defconfig
index fed202f15a7..7e67381d7d0 100644
--- a/arch/x86/defconfig
+++ b/arch/x86/defconfig
@@ -105,12 +105,10 @@ CONFIG_EOI_HANDLER_SUPPORTED=y
 #
 # CONFIG_PLATFORM_ATOM_N28XX is not set
 # CONFIG_PLATFORM_PCMINUTEIA is not set
-# CONFIG_PLATFORM_PCPENTIUM4 is not set
 CONFIG_PLATFORM_QUARK=y
 # CONFIG_PLATFORM_GENERIC_PC is not set
 # CONFIG_CPU_ATOM is not set
 CONFIG_CPU_MINUTEIA=y
-# CONFIG_CPU_PENTIUM4 is not set
 # CONFIG_CPU_MIGHT_SUPPORT_CLFLUSH is not set
 
 #
diff --git a/arch/x86/generic_pc/Kconfig b/arch/x86/generic_pc/Kconfig
index dedeee9d42b..6fe87c040e2 100644
--- a/arch/x86/generic_pc/Kconfig
+++ b/arch/x86/generic_pc/Kconfig
@@ -45,7 +45,6 @@ config LOAPIC_TIMER_FREQ
 	depends on PLATFORM_ATOM_N28XX
 
 config SYS_CLOCK_HW_CYCLES_PER_SEC
-	default 1193180   if PLATFORM_PCPENTIUM4
 	default 150000000 if PLATFORM_ATOM_N28XX
 	default 1193180   if PLATFORM_PCMINUTEIA
 
diff --git a/scripts/Makefile.x86.preparch b/scripts/Makefile.x86.preparch
index 10883feecdb..0bb3b7bda97 100644
--- a/scripts/Makefile.x86.preparch
+++ b/scripts/Makefile.x86.preparch
@@ -17,10 +17,9 @@ x86_FLAGS += $(LTO_FLAG)
 x86_FLAGS += $(PERF_OPT_FLAG)
 x86_FLAGS += $(iSSE_FP_MATH)
 
-ISA_FLAG_pentium4-$(CONFIG_CPU_PENTIUM4) = -march=pentium4
 ISA_FLAG_quark-$(CONFIG_CPU_MINUTEIA) = -march=pentium
 ISA_FLAG_atom-$(CONFIG_CPU_ATOM) = -march=atom -mtune=atom
-ISA_FLAG_x86 = $(strip $(ISA_FLAG_pentium4-y) $(ISA_FLAG_quark-y) $(ISA_FLAG_atom-y))
+ISA_FLAG_x86 = $(strip $(ISA_FLAG_quark-y) $(ISA_FLAG_atom-y))
 
 QEMU_BIOS ?= /usr/share/qemu
 QEMU_CPU_TYPE_x86 = qemu32