diff --git a/tools/v8_gypfiles/features.gypi b/tools/v8_gypfiles/features.gypi
index 6e21dac6d70..52cb7163442 100644
--- a/tools/v8_gypfiles/features.gypi
+++ b/tools/v8_gypfiles/features.gypi
@@ -216,15 +216,6 @@
     # Enable lazy source positions by default.
     'v8_enable_lazy_source_positions%': 1,
 
-    # Enable third party HEAP library
-    'v8_enable_third_party_heap%': 0,
-
-    # Libaries used by third party heap
-    'v8_third_party_heap_libs%': [],
-
-    # Source code used by third party heap
-    'v8_third_party_heap_files%': [],
-
     # Disable write barriers when GCs are non-incremental and
     # heap has single generation.
     'v8_disable_write_barriers%': 0,
@@ -434,9 +425,6 @@
       ['v8_disable_write_barriers==1', {
         'defines': ['V8_DISABLE_WRITE_BARRIERS',],
       }],
-      ['v8_enable_third_party_heap==1', {
-        'defines': ['V8_ENABLE_THIRD_PARTY_HEAP',],
-      }],
       ['v8_enable_atomic_object_field_writes==1', {
         'defines': ['V8_ATOMIC_OBJECT_FIELD_WRITES',],
       }],
diff --git a/tools/v8_gypfiles/toolchain.gypi b/tools/v8_gypfiles/toolchain.gypi
index e75ccf52a57..a5388783d9b 100644
--- a/tools/v8_gypfiles/toolchain.gypi
+++ b/tools/v8_gypfiles/toolchain.gypi
@@ -101,7 +101,7 @@
   # [GYP] this needs to be outside of the top level 'variables'
   'conditions': [
     ['host_arch=="ia32" or host_arch=="x64" or \
-      host_arch=="ppc" or host_arch=="ppc64" or \
+      host_arch=="ppc64" or \
       host_arch=="s390x" or \
       clang==1', {
       'variables': {
@@ -113,7 +113,7 @@
       },
     }],
     ['target_arch=="ia32" or target_arch=="x64" or \
-      target_arch=="ppc" or target_arch=="ppc64" or \
+      target_arch=="ppc64" or \
       target_arch=="s390x" or clang==1', {
       'variables': {
         'target_cxx_is_biarch%': 1,
@@ -328,43 +328,24 @@
           }],
           ],
       }],  # s390x
-      ['v8_target_arch=="ppc" or v8_target_arch=="ppc64"', {
+      ['v8_target_arch=="ppc64"', {
+        'defines': [
+          'V8_TARGET_ARCH_PPC64',
+        ],
+        'cflags': [
+          '-ffp-contract=off',
+        ],
         'conditions': [
-          ['v8_target_arch=="ppc"', {
-            'defines': [
-              'V8_TARGET_ARCH_PPC',
-            ],
-          }],
-          ['v8_target_arch=="ppc64"', {
-            'defines': [
-              'V8_TARGET_ARCH_PPC64',
-            ],
-            'cflags': [
-              '-ffp-contract=off',
-            ],
-          }],
-          ['v8_host_byteorder=="little"', {
-            'defines': [
-              'V8_TARGET_ARCH_PPC_LE',
-            ],
+          ['OS=="aix" or OS=="os400"', {
+            # Work around AIX ceil, trunc and round oddities.
+            'cflags': [ '-mcpu=power5+ -mfprnd' ],
           }],
-          ['v8_host_byteorder=="big"', {
-            'defines': [
-              'V8_TARGET_ARCH_PPC_BE',
-            ],
-            'conditions': [
-              ['OS=="aix" or OS=="os400"', {
-                # Work around AIX ceil, trunc and round oddities.
-                'cflags': [ '-mcpu=power5+ -mfprnd' ],
-              }],
-              ['OS=="aix" or OS=="os400"', {
-                # Work around AIX assembler popcntb bug.
-                'cflags': [ '-mno-popcntb' ],
-              }],
-            ],
+          ['OS=="aix" or OS=="os400"', {
+            # Work around AIX assembler popcntb bug.
+            'cflags': [ '-mno-popcntb' ],
           }],
         ],
-      }],  # ppc
+      }],  # ppc64
       ['v8_target_arch=="ia32"', {
         'defines': [
           'V8_TARGET_ARCH_IA32',
@@ -595,8 +576,7 @@
       }],
       ['(OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris" \
          or OS=="netbsd" or OS=="mac" or OS=="android" or OS=="qnx") and \
-        (v8_target_arch=="arm" or v8_target_arch=="ia32" or \
-         v8_target_arch=="ppc")', {
+        (v8_target_arch=="arm" or v8_target_arch=="ia32")', {
         'target_conditions': [
           ['_toolset=="host"', {
             'conditions': [
@@ -679,9 +659,6 @@
           '__STDC_FORMAT_MACROS',
           '_ALL_SOURCE=1'],
         'conditions': [
-          [ 'v8_target_arch=="ppc"', {
-            'ldflags': [ '-Wl,-bmaxdata:0x60000000/dsa' ],
-          }],
           [ 'v8_target_arch=="ppc64"', {
             'cflags': [ '-maix64', '-fdollars-in-identifiers', '-fno-extern-tls-init' ],
             'ldflags': [ '-maix64 -Wl,-bbigtoc' ],
diff --git a/tools/v8_gypfiles/v8.gyp b/tools/v8_gypfiles/v8.gyp
index 03b83790a93..cefa0d1dfc1 100644
--- a/tools/v8_gypfiles/v8.gyp
+++ b/tools/v8_gypfiles/v8.gyp
@@ -355,11 +355,6 @@
             '<(V8_ROOT)/src/builtins/mips64/builtins-mips64.cc',
           ],
         }],
-        ['v8_target_arch=="ppc"', {
-          'sources': [
-            '<(V8_ROOT)/src/builtins/ppc/builtins-ppc.cc',
-          ],
-        }],
         ['v8_target_arch=="ppc64"', {
           'sources': [
             '<(V8_ROOT)/src/builtins/ppc/builtins-ppc.cc',
@@ -761,11 +756,6 @@
               }],
             ],
           }],
-          ['v8_target_arch=="ppc"', {
-            'sources': [
-              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_enable_i18n_support.*?v8_current_cpu == \\"ppc\\".*?sources \\+= ")',
-            ],
-          }],
           ['v8_target_arch=="ppc64"', {
             'sources': [
               '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_enable_i18n_support.*?v8_current_cpu == \\"ppc64\\".*?sources \\+= ")',
@@ -849,11 +839,6 @@
               '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_compiler_sources =.*?v8_current_cpu == \\"mips64\\".*?v8_compiler_sources \\+= ")',
             ],
           }],
-          ['v8_target_arch=="ppc"', {
-            'sources': [
-              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_compiler_sources =.*?v8_current_cpu == \\"ppc\\".*?v8_compiler_sources \\+= ")',
-            ],
-          }],
           ['v8_target_arch=="ppc64"', {
             'sources': [
               '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_compiler_sources =.*?v8_current_cpu == \\"ppc64\\".*?v8_compiler_sources \\+= ")',
@@ -1066,13 +1051,6 @@
             '<(V8_ROOT)/src/wasm/fuzzing/random-module-generation.cc',
           ],
         }],
-        ['v8_enable_third_party_heap==1', {
-          # TODO(targos): add values from v8_third_party_heap_files to sources
-        }, {
-          'sources': [
-            '<(V8_ROOT)/src/heap/third-party/heap-api-stub.cc',
-          ],
-        }],
         ['v8_enable_heap_snapshot_verify==1', {
           'sources': [
             '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_enable_heap_snapshot_verify.*?sources \\+= ")',
@@ -1154,11 +1132,6 @@
             '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_enable_wasm_gdb_remote_debugging.*?v8_current_cpu == \\"mips64\\".*?sources \\+= ")',
           ],
         }],
-        ['v8_target_arch=="ppc"', {
-          'sources': [
-            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_enable_wasm_gdb_remote_debugging.*?v8_current_cpu == \\"ppc\\".*?sources \\+= ")',
-          ],
-        }],
         ['v8_target_arch=="ppc64"', {
           'sources': [
             '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_enable_wasm_gdb_remote_debugging.*?v8_current_cpu == \\"ppc64\\".*?sources \\+= ")',
@@ -1245,12 +1218,9 @@
         ['v8_postmortem_support', {
           'dependencies': ['postmortem-metadata#target'],
         }],
-        ['v8_enable_third_party_heap', {
-          # TODO(targos): add values from v8_third_party_heap_libs to link_settings.libraries
-        }],
         # Platforms that don't have Compare-And-Swap (CAS) support need to link atomic library
         # to implement atomic memory access
-        ['v8_current_cpu in ["mips64", "mips64el", "ppc", "arm", "riscv64", "loong64"]', {
+        ['v8_current_cpu in ["mips64", "mips64el", "arm", "riscv64", "loong64"]', {
           'link_settings': {
             'libraries': ['-latomic', ],
           },